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

ASV⁽ⁱ⁾ ¹⁹ Then came the disciples to Jesus apart, and said, Why could not we cast it out? ²⁰ And he saith unto them, Because of your little faith: 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.