Matthew 12:38-40

³⁸Then some of the scribes and Pharisees answered him, saying: Master we would see a sign from thee.s

³⁹Who answering said to them: An evil and adulterous generation seeketh a sign: and a sign shall not be given it, but the sign of Jonas the prophet.

⁴⁰For as Jonas was in the whale’s belly three days and three nights: so shall the Son of man be in the heart of the earth three days and three nights.t