Matthew 17:21
But this kind goeth not out but by prayer and fasting.
Mark 9:29
And he said to them, this kind can be driven out by nothing but prayer and fasting.
Matthew 12:45
Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. So shall it also be with this wicked generation.
Acts 13:2-3
And as they were employed in the ministry, and kept a fast, the Holy Ghost said, Set apart for me now both Barnabas and Saul for the work whereunto I have called them.
Acts 14:23
Then appointing them presbyters in every city, by prayer with fastings they commended them to the Lord, on whom they had believed.
1 Corinthians 7:5
Defraud not one another, except it may be by consent occasionally, that ye may have more leisure for fasting and prayer; and come together again, lest Satan tempt you through your incontinence.
2 Corinthians 11:27
in labour and travail, in watchings often, in fastings frequently, in hunger and thirst, in cold and nakedness;
Ephesians 6:18
praying at every opportunity with all prayer and supplication in Spirit, and watching for this very purpose with perseverance and intercession for all the saints;