38 Then certain of the scribes and Pharisees answered, saying, "Teacher, we will to see a sign from You." 39 And He answering said to them, "A generation, evil and adulterous, seeks a sign, and a sign will not be given to it, except the sign of Jonah the prophet; 40 for as Jonah was in the belly of the fish three days and three nights, so will the Son of Man be in the heart of the earth three days and three nights.