Luke 11:8
I tell you, though he will not get up and give you anything because you are a friend of his, he will at least rise and give you whatever you want, because you persist.
Matthew 15:22-28
And a woman of Canaan came out of these parts and wailed, "Have pity on me, Lord, O Son of David! My daughter is cruelly possessed by a daemon."
Luke 18:1-8
He also told them a parable about the need of always praying and never losing heart.
Romans 15:30
Brothers, I beg of you, by our Lord Jesus Christ and by the love that the Spirit inspires, rally round me by praying to God for me;
2 Corinthians 12:8
three times over I prayed the Lord to make it leave me,
Colossians 2:1
Striving? Yes, I want you to understand my deep concern for you and for those at Laodicea, for all who have never seen my face.
Colossians 4:12
Epaphras, who is one of yourselves, salutes you ??a servant of Christ Jesus who is always earnest in prayer for you, that you may stand firm like mature and convinced Christians, whatever be the will of God for you.