Matthew 17:21
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Mark 9:29
And he said to them, "This kind can only come out by prayer."
Matthew 12:45
Then he goes and takes with him seven other spirits more wicked than himself, and they enter 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
While they were worshipping the Lord and fasting, the Holy Spirit said, "Set apart for me Barnabas and Saul for 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 committed them to the Lord in whom they believed.
1 Corinthians 7:5
Do not deprive one another, except by agreement for a time, so that you may devote yourselves to prayer, and then come together again so that Satan will not tempt you because of your lack of self-control.
2 Corinthians 11:27
I have been in labor and hardship, through many sleepless nights, in hunger and thirst, often without food, in cold and exposure.
Ephesians 6:18
Pray at all times in the Spirit, with all prayer and petition. And with this in view, keep alert with all perseverance and petition for all the saints,