Matthew 17:19-21 Then came the disciples to Jesus apart, and said, Why could not we cast him out?

KJV⁽ⁱ⁾ ¹⁹ Then came the disciples to Jesus apart, and said, Why could not we 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 Howbeit this kind goeth not out but by prayer and fasting.

RKJNT⁽ⁱ⁾ ¹⁹ Then the disciples came to Jesus privately, and said, Why could we not cast it out? ²⁰ And Jesus said to them, Because of your unbelief: for truly I say to you, If you have faith as a grain of mustard seed, you shall say to this mountain, Move from here to there; and it shall move; and nothing shall be impossible for you. ²¹ [Yet this kind does not go out except by prayer and fasting.]