Matthew 17:19-20 Then the disciples came to Jesus apart and said, Why could not we cast him out?

EJ2000⁽ⁱ⁾ ¹⁹ Then the disciples came to Jesus apart and said, Why could not we cast him out? ²⁰ And Jesus said unto them, Because of your unfaithfulness; for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove from here to yonder place, and it shall remove; and nothing shall be impossible unto you.