Matthew 17:21
But this kind goes not out, except by prayer and fasting.
Mark 9:29
And he said to them, This kind can go out by nothing but prayer.
Matthew 12:45
Then it goes and takes with itself seven other spirits worse than itself, and they enter in and dwell there; and the last state of that man is worse than the first. So shall it be also with this evil generation.
Acts 13:2-3
And while they served the Lord and fasted, the Holy Spirit said, Separate me Barnabas and Saul for the work to which I have called them.
Acts 14:23
And having appointed them elders in every church, and having prayed with fasting, they commended them to the Lord in whom they had believed.
1 Corinthians 7:5
Withhold not yourselves from one another, except by agreement for a time that you may be at leisure for prayer, and come together again, that Satan may not tempt you by your incontinence.
2 Corinthians 11:27
in labor and weariness, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.
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,