Matthew 17:21
"But this kind is driven out by prayer alone."
Mark 9:29
"This kind can only be cast out by prayer," he replied.
Matthew 12:45
"Then it goes and brings with it 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 with this wicked generation."
Acts 13:2-3
And as they were worshiping the Lord, and fasting, the Holy Spirit said to them, "Separate me Barnabas and Saul for the work to which I have called them."
Acts 14:23
They chose elders for them in every church, after prayer and fasting, and commended them to the Lord in whom they had believed.
1 Corinthians 7:5
Do not refuse one another, unless it is only temporary and by mutual consent, so that you may devote yourselves to prayer. Then come together again, lest through your lack of self-control Satan begin to tempt you to sin.
2 Corinthians 11:27
in toil and weariness, often in sleepless watching, in hunger and thirst, often without anything to eat; in cold and in nakedness.
Ephesians 6:18
Continue to pray at all times, with all prayer and supplication in the Spirit, and watching for it with all perseverance and supplication for all saints;