Luke 11:8-10
I tell you if he will not arise and give him on account of being his friend, yet, on account of his importunity, he will arise and give him as many as he needs.
Luke 18:1
AND he spoke also a parable to them, that men ought to pray at all times, and not to faint;
Ephesians 6:18
praying with all prayer and supplication on every occasion with the spirit, and watching in the same with all perseverance and supplication for all the saints,
Colossians 4:2
Be constant in prayer, watching in it with thanksgiving,
1 Thessalonians 5:17
pray without ceasing,
James 5:16
Confess your faults one to another, and pray one for another, that you may be cured, for the prayer of the righteous operates with great power.