Matthew 17:10-21

¹⁰And His disciples asked Him, “Why then do the scribes say that Elijah must come first?” ¹¹And He answered and said, “Elijah is coming and will restore all things; ¹²but I say to you that Elijah already came, and they did not recognize him, but did to him whatever they wanted. So also the Son of Man is going to suffer at their hands.” ¹³Then the disciples understood that He had spoken to them about John the Baptist.

¹⁴When they came to the crowd, a man came up to Jesus, falling on his knees before Him and saying, ¹⁵“Lord, have mercy on my son, because he has seizures and suffers terribly; for he often falls into the fire and often into the water. ¹⁶And I brought him to Your disciples, and they could not cure him.” ¹⁷And Jesus answered and said, “You unbelieving and perverse generation, how long shall I be with you? How long shall I put up with you? Bring him here to Me.” ¹⁸And Jesus rebuked him, and the demon came out of him, and the boy was healed at once.

¹⁹Then the disciples came to Jesus privately and said, “Why could we not cast it out?” ²⁰And He *said to them, “Because of your meager faith; for truly I say to you, if you have faith the size of 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.”

²¹But this kind doesn`t go out except by prayer and fasting."