¹⁹ Then the disciples came to Jesus privily, and said to him, Why might not we cast him out?

²⁰ Jesus saith to them [Jesus said to them], For your unbelief. Truly I say to you, if ye have faith, as a corn of mustard seed, ye shall say to this hill, Pass thou hence [Pass thou from hence], and it shall pass; and nothing shall be impossible to you;

²¹ but this kind is not cast out, but by prayer and fasting.