However, this kind does not go out except by prayer and fasting."
Matthew 17:21
Surrounding context
17:20 So Jesus said to them, "Because of your unbelief; for assuredly, I say to you, if you have faith as a mustard seed, you will say to this mountain, "Move from here to there,' and it will move; and nothing will be impossible for you.
17:21 However, this kind does not go out except by prayer and fasting."
17:22 Now while they were staying in Galilee, Jesus said to them, "The Son of Man is about to be betrayed into the hands of men,