Matthew 17:21
Howbeit this lineage of demons does not go out but by prayer and fasting.
Mark 9:29
And he said unto them, This kind can come forth by nothing, but by prayer and fasting.
1 Kings 17:20-21
And he cried unto the LORD and said, O LORD my God, hast thou even brought evil upon the widow, with whom I sojourn, by killing her son?
Daniel 9:3
And I turned my face unto the Lord God, seeking him in prayer and supplication, in fasting and sackcloth, and ashes:
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. Even so shall it also be unto this wicked generation.
Acts 13:2-3
As they ministered to the Lord and fasted, the Holy Spirit said, Separate me Barnabas and Saul for the work unto which I have called them.
Acts 14:23
And having ordained elders for them in every congregation and having prayed with fasting, they commended them to the Lord on whom they believed.
1 Corinthians 7:5
Do not defraud one another, except it be with mutual consent for a time, that ye may give yourselves to fasting and prayer and come together again, that Satan not tempt you for your incontinency.
2 Corinthians 11:27
in labour and travail, in many watches, in hunger and thirst, in many fasts, in cold and nakedness.
Ephesians 6:18
praying always with all prayer and supplication in the Spirit and watching in this with all perseverance and supplication for all the saints