Mark 9:29 in the World English Bible
He said to them, “This kind can come out by nothing but by prayer and fasting.”
Context
28 And when he was come into the house, his disciples asked him privately, Why could not we cast him out?
29 And he said unto them, This kind can come forth by nothing, but by prayer and fasting.
30 And they departed thence, and passed through Galilee; and he would not that any man should know it.