1 Samuel 1:12
And it came to pass as she continued praying before Jehovah, that Eli marked her mouth.
Luke 11:8-10
I say to you, Although he will not get up and give them to him because he is his friend, because of his shamelessness, at any rate, he will rise and give him as many as he wants.
Luke 18:1
And he spoke also a parable to them to the purport that they should always pray and not faint,
Ephesians 6:18
praying at all seasons, with all prayer and supplication in the Spirit, and watching unto this very thing with all perseverance and supplication for all the saints;
Colossians 4:2
Persevere in prayer, watching in it with thanksgiving;
1 Thessalonians 5:17
pray unceasingly;
James 5:16
Confess therefore your offences to one another, and pray for one another, that ye may be healed. The fervent supplication of the righteous man has much power.