Matthew 17:18-21

New King James Version

¹⁸ And Jesus ^(A)rebuked the demon, and it came out of him; and the child was cured from that very hour.

¹⁹ Then the disciples came to Jesus privately and said, “Why could we not cast it out?”

²⁰ So Jesus said to them, “Because of your ^[a]unbelief; for assuredly, I say to you, ^(B)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. ^21 [b]However, this kind does not go out except by prayer and fasting.”