Matthew 12:38-40

Moffatt(i) 38 Then some of the scribes and Pharisees said to him, "Teacher, we would like to have some Sign from you." 39 He replied to them, "It is an evil and disloyal generation that craves a Sign, but no Sign will be given to it except the Sign of the prophet Jonah; 40 for as Jonah was three days and three nights in the belly of the whale, so the Son of man will be three days and three nights in the heart of the earth.