Mark 9:28-31

²⁸And he said to them: This kind can go out by nothing, but by prayer and fasting.

²⁹And departing from thence, they passed through Galilee, and he would not that any man should know it.

³⁰And he taught his disciple, and said to them: The Son of man shall be betrayed into the hands of men, and they shall kill him; and after that he is killed, he shall rise again the third day.

³¹But they understood not the word, and they were afraid to ask him.