Mark 9:28-31

²⁸And when he had gone into the house, his disciples said to him privately, Why were we unable to send it out?

²⁹And he said to them, Nothing will make this sort come out but prayer.

³⁰And they went out from there, through Galilee; and it was his desire that no man might have knowledge of it;

³¹For he was giving his disciples teaching, and saying to them, The Son of man is given up into the hands of men, and they will put him to death; and when he is dead, after three days he will come back from the dead.