Matthew 17:19-21

RYLT(i) 19 Then the disciples having come to Jesus by himself, said, 'Why were we not able to cast him out?' 20 And Jesus said to them, 'Through your want of faith; for verily I say to you, if you may have faith as a grain of mustard, you shall say to this mount, Remove hence to yonder place, and it shall remove, and nothing shall be impossible to you, 21 and this kind does not go forth except in prayer and fasting.'