Acts 12:12
And when he had realized this, he went to the house of Mary the mother of John, also called Mark, where many people were gathered together praying.

Isaiah 62:6, 7
On your walls, O Jerusalem, I have posted watchmen; they will never be silent day or night. You who call on the LORD shall take no rest for yourselves, . . .

Matthew 18:19
Again, I tell you truly that if two of you on the earth agree about anything you ask for, it will be done for you by My Father in heaven.

Luke 18:1
Then Jesus told them a parable about their need to pray at all times and not lose heart:

1 Corinthians 12:26
If one part suffers, every part suffers with it; if one part is honored, every part rejoices with it.

2 Corinthians 1:11
as you help us by your prayers. Then many will give thanks on our behalf for the favor shown us in answer to their prayers.

Ephesians 6:18-20
Pray in the Spirit at all times, with every kind of prayer and petition. To this end, stay alert with all perseverance in your prayers for all the saints. . . .

1 Thessalonians 5:17
Pray without ceasing.

Hebrews 13:3
Remember those in prison as if you were bound with them, and those who are mistreated as if you were suffering with them.

James 5:16
Therefore confess your sins to each other and pray for each other so that you may be healed. The prayer of a righteous man has great power to prevail.