Other texts on prayer, fasting power?
Which other scriptures highlight the power of prayer and fasting in spiritual warfare?

The Battle Scene in Matthew 17:21

“However, this kind does not go out except by prayer and fasting.” (Matthew 17:21)

• Jesus ties victory over a stubborn, demonic stronghold directly to focused prayer joined with fasting.

• The verse plants a clear principle: when opposition is fierce, believers press in through both disciplines for breakthrough.


Old Testament Portraits: Fasting That Cleared the Skies

Daniel 10:2-3, 12-13 – Daniel’s three-week fast humbles him; an angel explains that while Daniel prayed, an unseen battle raged: “from the first day that you purposed to understand… your words were heard.”

2 Chronicles 20:3-4, 14-17 – Jehoshaphat proclaims a fast; Judah prays, and God answers, “Do not be afraid… the battle is not yours, but God’s,” leading to an effortless victory.

Ezra 8:21-23 – A corporate fast at the Ahava Canal seeks protection from enemies; “He heard our petition,” and the caravan reaches Jerusalem safely.

Isaiah 58:6 – God’s chosen fast “breaks the chains of wickedness… sets the oppressed free,” revealing fasting as a weapon against bondage.

Joel 2:12-13 – A call to return “with fasting, weeping, and mourning” prepares the nation for divine intervention against invading forces.


New Testament Reinforcement: Prayer, Fasting, and Apostolic Power

Mark 9:29 – Parallel to Matthew 17:21: “This kind cannot come out except by prayer and fasting,” confirming the principle in another Gospel witness.

Acts 13:2-3 – While the Antioch church “was worshiping the Lord and fasting,” the Holy Spirit directs the first missionary thrust; fasting fine-tunes spiritual hearing.

Acts 14:23 – Paul and Barnabas appoint elders “with prayer and fasting,” entrusting fledgling churches to God amid spiritual hostility.

1 Corinthians 7:5 – Married believers may agree to a temporary fast from intimacy “to devote yourselves to prayer,” underscoring the partnership of the two practices.


The Armor and the Weapons: Prayer in the Wider War

Ephesians 6:18 – After listing the full armor, Paul urges: “Pray in the Spirit at all times, with every kind of prayer and petition.” Prayer activates each piece of armor.

2 Corinthians 10:3-4 – “The weapons of our warfare… have divine power to demolish strongholds.” Prayer and fasting place those weapons in believers’ hands.

James 4:7-10 – “Submit yourselves therefore to God… Resist the devil, and he will flee… Humble yourselves before the Lord.” Fasting expresses that humility and strengthens resistance.


Snapshots of Results

• Chains broken (Isaiah 58:6).

• Angelic assistance released (Daniel 10:12-13).

• Clear guidance given (Acts 13:2-3).

• National deliverance granted (2 Chronicles 20:15-30).

• Personal victory over temptation modeled by Jesus’ own forty-day fast (Matthew 4:1-11).


Practical Threads to Weave Today

• Combine sustained, Scripture-saturated prayer with a fast (partial or complete as health allows) when confronting entrenched sin, demonic oppression, or critical decisions.

• Fast with humility, seeking God’s face rather than manipulating His hand (Isaiah 58:3-9).

• Engage corporate fasting for churchwide or national crises, following the patterns of Judah, Ezra, and the Antioch believers.

• Keep spiritual armor on through continual prayer (Ephesians 6:18), letting fasting amplify dependence on God rather than self-effort.

How can Matthew 17:21 inspire deeper commitment to spiritual disciplines in daily life?
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