Acts 12:5
Peter was kept in prison. Prayer was made without ceasing by the congregation to God for him.
2 Corinthians 1:11
You also helped with your prayer on our behalf. Many may give thanks for the gift granted to us.
Isaiah 62:6-7
I have posted watchmen on your walls, O Jerusalem. They will never be silent day or night. Whoever calls on Jehovah, do not allow yourselves any rest,
Matthew 18:19
Again, I say to you, that if two of you are in agreement on earth about anything for which they will make a request, it will be done for them by my Father in heaven.
Luke 18:1
He spoke an illustration to them emphasizing the need to pray and not become tired:
Acts 12:12
After he thought about what happened he went to the house of Mary the mother of John, surnamed Mark. Many were gathered there to pray.
1 Corinthians 12:26
When one member suffers all the members suffer with it. When one member is honored, all the members rejoice with it.
Ephesians 6:18-20
With prayer and supplication pray at all times in the Spirit. Watch with all perseverance and supplication for all the holy ones.
1 Thessalonians 5:17
Pray without ceasing.
Hebrews 13:3
Remember those who are in prison, as though you were in prison with them. Remember those who are suffering, as though you were suffering as they are.
James 5:16
Confess therefore your sins one to another, and pray one for another, that you may be healed. The prayer of a righteous man helps much.