Luke 11:8-10
I tell you, though he will not get up and give to him because he is his friend, yet because of his persistence he will rise and give him as much as he needs.
Luke 18:1
Then he told them a parable, to show that they ought always to pray and not lose heart.
Ephesians 6:18
Pray at all times in the Spirit, with all prayer and petition. And with this in view, keep alert with all perseverance and petition for all the saints,
Colossians 4:2
Devote yourselves to prayer, being watchful in it with thanksgiving.
1 Thessalonians 5:17
pray without ceasing,
James 5:16
Therefore, confess your sins to one another, and pray for one another so that you may be healed. The prayer of a righteous man is powerful and effective.