What does the Bible say about the power of prayer?

In Acts 12:5, we see the church fervently praying for Peter while he is imprisoned. This earnest and united prayer demonstrates that the collective prayers of God’s people can lead to divine intervention. Samuel Rutherford aptly noted that while the angel fetched Peter out of prison, it was prayer that fetched the angel. This shows the vital role prayer plays in the life of believers, as it reflects dependence on God and a cry for his assistance in times of need. Prayer can indeed be powerful, opening locked doors and overcoming barriers we face in life.