38 Then some of the scribes and Pharisees, hearing this, said to him, Master, we are looking for a sign from you.
39 But he, answering, said to them, An evil and false generation is looking for a sign; and no sign will be given to it but the sign of the prophet Jonah:
40 For as Jonah was three days and three nights in the stomach of the great fish, so will the Son of man be three days and three nights in the heart of the earth.