Here is information on fasting. What the bible says about it. How it was used. How helpful it is spiritually and the health benefits of fasting.
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Printable Bible Study: Fasting in Scripture
Fasting is one of the most consistent spiritual practices found throughout the Bible. It was never presented as a way to earn Yahweh's favor, but as a way to humble oneself, seek Him more earnestly, express repentance, and devote oneself to prayer.
1. What Is Biblical Fasting?
Biblical fasting is voluntarily abstaining from food (and sometimes drink for very short periods) for a spiritual purpose.
The Hebrew word often means "to humble oneself" (×¢ָ× ָ×”, anah), and the Greek word νηστεία (nÄ“steia) literally means "not eating."
Most biblical fasts involved:
- Abstaining from food
- Drinking water (except for a few extraordinary fasts)
- Spending extra time in prayer
- Reading Scripture
- Seeking Yahweh's guidance
It was never intended to be merely a diet.
2. Why Did People Fast?
To Humble Themselves Before Yahweh
"I humbled my soul with fasting..."
— Psalm 35:13
"Humble yourselves before Yahweh..."
— James 4:10
Fasting reminds us that we depend on Yahweh more than on food.
To Seek Yahweh's Guidance
When important decisions had to be made:
- Moses
- Ezra
- Jehoshaphat
- Daniel
- Paul
- Barnabas
all fasted while seeking Yahweh.
"We fasted and sought our God... and He answered our prayer."
— Ezra 8:21–23
Repentance
When Israel sinned:
Joel 2:12–13
"Return to Me with all your heart,
with fasting..."
The people of Nineveh also proclaimed a fast after hearing Jonah's warning.
Mourning
David fasted after the death of Saul.
Israel fasted after national tragedies.
Fasting often accompanied grief.
During Times of Crisis
King Jehoshaphat proclaimed a national fast when Judah was threatened by invasion.
2 Chronicles 20
Instead of trusting military strength, they sought Yahweh.
Before Beginning Ministry
Yeshua of Nazareth fasted forty days before beginning His public ministry.
Matthew 4:1–2
Before Ordaining Leaders
The early believers fasted before appointing elders.
Acts 13:2–3
Acts 14:23
3. Who Fasted in the Bible?
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Person
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Purpose
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Moses
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Receiving the Law
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David
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Prayer, grief
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Elijah
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Preparation
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Daniel
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Humility and understanding
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Ezra
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Protection
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Nehemiah
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Mourning for Jerusalem
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Esther
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Deliverance
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Jehoshaphat
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National crisis
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Nineveh
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Repentance
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Anna
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Worship
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Yeshua
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Spiritual preparation
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Paul
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After conversion
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Early Church
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Seeking guidance
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4. How Long Did They Fast?
Partial Fast
Daniel avoided rich foods.
Daniel 10:2–3
One Day
Sunrise to sunset.
Very common in Israel.
Three Days
Esther requested this fast.
Esther 4:16
Forty Days
Moses
Elijah
Yeshua
These were extraordinary fasts empowered by Yahweh and are not typical.
5. What Did Yeshua Teach?
He assumed His followers would fast.
"When you fast..."
Matthew 6:16
Notice He did not say "if."
He instructed believers:
- Don't fast to impress others.
- Don't look miserable.
- Fast quietly.
- Let Yahweh see it.
6. Fasting Must Be Accompanied by Right Living
Isaiah 58 is the Bible's greatest chapter on fasting.
Yahweh says He is not impressed by fasting if people continue:
- oppression
- selfishness
- injustice
- fighting
Instead He desires:
- mercy
- generosity
- helping the poor
- breaking oppression
- obedience
A changed heart matters more than an empty stomach.
7. The Day of Atonement
One fast was commanded for all Israel.
The Day of Atonement required Israel to "afflict your souls."
Leviticus 16:29–31
This has traditionally been understood as fasting.
No other annual fast is commanded in the Law.
Spiritual Benefits
It teaches dependence upon Yahweh.
"Man shall not live by bread alone..."
Deuteronomy 8:3
Quoted by Yeshua in Matthew 4.
It increases focus during prayer.
Without preparing meals and eating, more time becomes available for prayer and Scripture.
It humbles pride.
Hunger reminds us how weak and dependent we really are.
It strengthens self-control.
Learning to deny physical desires can help strengthen discipline in other areas.
It helps remove distractions.
Modern life is full of constant stimulation.
Fasting helps quiet the mind and refocus attention on Yahweh.
It encourages repentance.
Many people find fasting helps them examine their hearts more honestly.
It prepares us for difficult decisions.
Throughout Scripture, fasting often preceded major decisions.
Health Benefits of Fasting
Medical research on intermittent fasting and time-restricted eating has found several potential benefits for many adults, though results vary and fasting is not appropriate for everyone.
Possible benefits include:
- Improved insulin sensitivity
- Better blood sugar regulation
- Weight loss (for some people)
- Lower inflammation markers
- Improved blood pressure
- Increased fat burning during fasting periods
- Cellular repair processes such as autophagy (which become more active during longer fasts)
- Possible improvements in cholesterol and triglycerides
- Improved metabolic flexibility
These benefits depend on factors such as the person's health, the type and length of the fast, and overall diet. Evidence is stronger for some outcomes (such as weight loss and insulin sensitivity) than for others.
A Simple Biblical Fast
Many believers choose to:
- Pray before beginning.
- Drink plenty of water.
- Read Scripture several times during the day.
- Spend extra time in prayer.
- Confess sins.
- Pray for others.
- End the fast with a modest meal rather than overeating.
Who Should Be Careful?
Extended fasting is not appropriate for everyone without medical supervision. People who should speak with a healthcare professional before fasting include:
- Those with diabetes who use insulin or certain glucose-lowering medications
- Pregnant or breastfeeding women
- Children
- Frail older adults
- People who are underweight
- Anyone with a history of an eating disorder
- People with certain chronic medical conditions or who take medications that require food
Key Biblical Principle
The purpose of fasting is not to manipulate Yahweh into answering prayers.
Rather, fasting changes us. It humbles our hearts, deepens our dependence on Yahweh, sharpens our focus in prayer, and helps align our will with His.
As Isaiah teaches in chapter 58, the fast that pleases Yahweh is one joined with justice, mercy, compassion, and obedience—not merely going without food.
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Printable Bible Study: Fasting in Scripture
Humbling Ourselves Before Yahweh
What Is Biblical Fasting?
Biblical fasting is the voluntary abstaining from food for a spiritual purpose. It is not a way to earn salvation or force Yahweh to answer prayer. Rather, fasting is a means of humbling ourselves, seeking Yahweh with greater focus, expressing repentance, and drawing closer to Him.
"Man shall not live by bread alone; but man lives by every word that proceeds from the mouth of Yahweh."
Deuteronomy 8:3
Yeshua quoted this scripture during His forty-day fast (Matthew 4:4), emphasizing that our greatest need is spiritual rather than physical.
Why Do We Fast?
1. To Humble Ourselves Before Yahweh
Fasting reminds us that we depend completely upon Yahweh.
Psalm 35:13
"I humbled myself with fasting..."
Ezra 8:21
"Then I proclaimed a fast... that we might humble ourselves before our God."
James 4:10
"Humble yourselves in the sight of the Lord, and He will lift you up."
2. To Seek Yahweh's Guidance
Before important decisions, God's people often fasted.
Ezra
Ezra 8:21–23
The people fasted before making the dangerous journey back to Jerusalem.
Result:
Yahweh answered their prayer and protected them.
Early Church
Acts 13:2–3
Before sending Barnabas and Saul on their missionary journey:
- They prayed.
- They fasted.
- The Holy Spirit directed them.
Appointing Elders
Acts 14:23
Paul and Barnabas appointed elders "with prayer and fasting."
3. Repentance
Throughout Scripture fasting accompanies genuine repentance.
Joel
Joel 2:12–13
"Return to Me with all your heart,
with fasting,
with weeping,
and with mourning."
Yahweh wanted changed hearts—not merely empty stomachs.
Nineveh
Jonah 3:5–10
The people proclaimed a fast after hearing Jonah preach.
The king himself humbled himself.
Yahweh spared the city.
4. During Times of Great Trouble
Jehoshaphat
2 Chronicles 20:1–30
When a huge army approached Judah:
- Jehoshaphat proclaimed a national fast.
- The nation sought Yahweh.
- Yahweh fought the battle.
One of Scripture's greatest examples of trusting Yahweh instead of human strength.
Esther
Esther 4:15–17
Before risking her life:
"Fast for me..."
The Jews fasted three days.
5. Mourning
Fasting often accompanied grief.
Examples:
2 Samuel 1:11–12
David fasted after Saul's death.
2 Samuel 12:16
David fasted while praying for his sick child.
6. Seeking Understanding
Daniel
Daniel 9
Daniel fasted while confessing Israel's sins.
Yahweh answered through Gabriel.
Daniel 10:2–3
Daniel's partial fast:
- No pleasant food
- No meat
- No wine
For twenty-one days.
7. Preparing for Ministry
Moses
Exodus 34:28
Forty days while receiving the Law.
Elijah
1 Kings 19:8
Forty days to Horeb.
Yeshua
Matthew 4:1–11
Forty days before beginning His ministry.
He overcame Satan using Scripture.
What Did Yeshua Teach About Fasting?
Matthew 6:16–18
Notice He did not say:
"If you fast..."
He said:
"When you fast..."
He instructed His followers:
✓ Do not fast for attention.
✓ Do not appear miserable.
✓ Let your Father see your fast.
✓ Seek His reward—not man's.
Can Believers Fast After Yeshua?
Absolutely.
Matthew 9:14–15
Yeshua said:
"The days will come when the bridegroom will be taken away... and then they will fast."
The apostles clearly continued fasting after His resurrection.
Isaiah 58 — The Fast Yahweh Chooses
This is the Bible's greatest chapter on fasting.
Yahweh says fasting is worthless if we continue:
- selfishness
- oppression
- strife
- injustice
Instead He desires:
- mercy
- generosity
- kindness
- helping the poor
- obedience
Isaiah 58:6–11
True fasting changes the heart.
The One Commanded Fast
Only one annual fast was commanded under the Law.
Day of Atonement
Leviticus 16:29–31
Leviticus 23:27–32
Israel was commanded to:
"Afflict your souls."
This has long been understood as fasting.
No other annual fast is specifically commanded in the Law.
Different Types of Biblical Fasts
Normal Fast
No food.
Water is generally allowed.
Most biblical fasts.
Partial Fast
Daniel 10
Avoiding certain foods.
Absolute Fast
No food or water.
Examples:
Esther
Paul (Acts 9)
Because dehydration can become dangerous quickly, these fasts were short and exceptional.
Supernatural Fast
Moses
Elijah
Yeshua
Forty days.
These were miraculous and should not be considered normal models for believers.
Spiritual Benefits
Fasting helps us:
✓ Humble ourselves
✓ Draw nearer to Yahweh
✓ Focus our prayers
✓ Increase self-control
✓ Remove distractions
✓ Deepen repentance
✓ Prepare for important decisions
✓ Strengthen dependence upon Yahweh
Health Benefits
While the Bible emphasizes spiritual purposes, research has found that fasting may also:
- Improve insulin sensitivity
- Lower blood sugar (for many people)
- Promote weight loss
- Reduce inflammation
- Improve blood pressure
- Increase fat burning
- Stimulate cellular repair processes during longer fasts
- Improve metabolic health
These benefits vary by individual and should not be the primary reason for a biblical fast.
Who Should Consult a Doctor Before Fasting?
People with:
- Diabetes using insulin or certain medications
- Pregnancy or breastfeeding
- Eating disorders
- Serious chronic illness
- Underweight or frailty
- Medications that require food
Practical Guide for a One-Day Biblical Fast
Before beginning:
- Pray.
- State your purpose before Yahweh.
- Read Scripture.
During the fast:
- Drink water unless you have a specific reason not to.
- Spend meal times in prayer.
- Read Scripture throughout the day.
- Avoid unnecessary entertainment and distractions.
- Ask Yahweh to search your heart (Psalm 139:23–24).
Breaking the fast:
- Begin with a light meal.
- Eat slowly.
- Thank Yahweh.
- Continue in prayer and obedience.
Major Scriptures on Fasting
The Law
- Leviticus 16:29–31
- Leviticus 23:27–32
- Deuteronomy 8:3
Historical Books
- 1 Samuel 7:6
- 2 Samuel 1:12
- 2 Samuel 12:16–23
- 1 Kings 19:8
- 2 Chronicles 20
- Ezra 8:21–23
- Nehemiah 1:4
Wisdom Literature
- Psalm 35:13
- Psalm 69:10
- Psalm 109:24
Prophets
- Isaiah 58
- Jeremiah 14:12
- Daniel 9
- Daniel 10
- Joel 2:12–13
- Jonah 3
- Zechariah 7:5–10
Gospels
- Matthew 4:1–11
- Matthew 6:16–18
- Matthew 9:14–15
- Mark 2:18–20
- Luke 2:37
- Luke 4:1–2
Acts
- Acts 9:9
- Acts 13:2–3
- Acts 14:23
Epistles
- 2 Corinthians 6:5
- 2 Corinthians 11:27
Memory Verses
Matthew 6:16–18 — Fast to please your Father, not people.
Isaiah 58:6 — The fast Yahweh chooses.
Joel 2:12 — Return with all your heart, with fasting.
Ezra 8:21 — Humble ourselves before our God.
Deuteronomy 8:3 — Man lives by every word from Yahweh.
Psalm 35:13 — I humbled myself with fasting.
Summary
Fasting is a God-given discipline that humbles the heart, deepens prayer, sharpens spiritual focus, and expresses dependence on Yahweh. Scripture presents it as a voluntary act of worship (except for the Day of Atonement), never as a means of earning righteousness. The fast Yahweh desires is joined with repentance, obedience, justice, mercy, and love for others. As Yeshua taught, fasting should be done quietly and sincerely, seeking the Father's approval rather than human recognition (Matthew 6:16–18).
