Matthew 12:39–40 (Listen)
39 But he answered them, “An evil and adulterous generation seeks for a sign, but no sign will be given to it except the sign of the prophet Jonah. 40 For just as Jonah was three days and three nights in the belly of the great fish, so will the Son of Man be three days and three nights in the heart of the earth.
2 Peter 1:21 (Listen)
21 For no prophecy was ever produced by the will of man, but men spoke from God as they were carried along by the Holy Spirit.
John 20:29 (Listen)
29 Jesus said to him, “Have you believed because you have seen me? Blessed are those who have not seen and yet have believed.”