Matthew 17:21
But this kind does not go out but by prayer and fasting.
Mark 9:29
And he said to them: This kind can go out by nothing, but by prayer and fasting.
Matthew 12:45
Then he goes and takes 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 be with this wicked generation.
Acts 13:2-3
And while they were ministering to the Lord, and fasting, the Holy Spirit said: Set apart for me Barnabas and Saul, to the work to which I have called them.
Acts 14:23
And when they had appointed elders for them in every church, with prayer and fasting, they commended them to the Lord, on whom they believed.
1 Corinthians 7:5
Debar not one another, unless by agreement for a time, that you may have leisure for prayer; and come together again, lest Satan tempt you through your incontinence.
2 Corinthians 11:27
in weariness and in toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness:
Ephesians 6:18
praying with all prayer and supplication, at all times, in the Spirit; and to this end being watchful in all perseverance, and supplication for all the saints: