Mark 9:28-31

²⁸And when he was come into the house, his disciples asked him privately, Why could not we cast him out?

²⁹And he said unto them, This kind can come forth by nothing, but by prayer and fasting.

³⁰And they departed thence, and passed through Galilee; and he would not that any man should know it.

³¹For he taught his disciples, and said unto them, The Son of man is delivered into the hands of men, and they shall kill him; and after that he is killed, he shall rise the third day.