Mark 9:9-10, 31-32

As they were coming down from the mountain, He gave them orders not to relate to anyone what they had seen, until the Son of Man rose from the dead. They seized upon that statement, discussing with one another what rising from the dead meant.

For He was teaching His disciples and telling them, “The Son of Man is to be delivered into the hands of men, and they will kill Him; and when He has been killed, He will rise three days later.” But they did not understand this statement, and they were afraid to ask Him.