CAB(i)
16 So I brought him to Your disciples, but they were not able to heal him."
17 Then Jesus answered and said, "O unfaithful and perverted generation, how long shall I be with you? How long shall I bear with you? Bring him here to Me."
18 And Jesus rebuked the demon, and it came out from him; and the boy was healed 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 unbelief; for assuredly I say to you, if you have faith like a mustard seed, you shall say to this mountain, 'Be moved from here to there,' and it shall move; and nothing shall be impossible for you.
21 However, this kind does not go out except by prayer and fasting."