Matthew 17:12-22

12 But I say unto you that Elijah is come already, and they knew him not, but have done unto him whatsoever they pleased. Likewise shall also the Son of Man suffer by them."

13 Then the disciples understood that He spoke unto them of John the Baptist.

14 And when they had come to the multitude, there came to Him a certain man, kneeling down to Him and saying,

15 "Lord, have mercy on my son, for he is lunatic and sorely vexed; for ofttimes he falleth into the fire and oft into the water.

16 And I brought him to Thy disciples, and they could not cure him."

17 Then Jesus answered and said, "O faithless and perverse generation, how long shall I be with you? How long shall I suffer you? Bring him hither to Me."

18 And Jesus rebuked the devil, and he departed out of him, and the child was cured from that very hour.

19 Then came the disciples to Jesus apart and said, "Why could we not cast him out?"

20 And Jesus said unto them, "Because of your unbelief; for verily I say unto you, if ye have faith as a grain of mustard seed, ye shall say unto this mountain, `Remove hence to yonder place,' and it shall remove. And nothing shall be impossible unto you.

21 However this kind goeth not out but by prayer and fasting."

22 And while they abode in Galilee, Jesus said unto them, "The Son of Man shall be betrayed into the hands of men.