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As Jonah was three days and three nights in the whale's belly; so shall the Son of man be three days and three nights in the heart of the earth. 12:40
Trivia: What did Jesus's disciples say after hearing his teaching on divorce?
Only one more thing will happen before the end comes: the gospel will be preached throughout the world (14). Well, that and the abomination of desolations will stand in the holy place (15), many false Christs and false prophets will show great signs and wonders (24), the sun and moon will be darkened and the stars will fall (29), the sign of the son of Man will appear in the sky, everyone on earth will mourn, and then, finally, the great and powerful son of Man will come in all his glory (30).
Oh, and all these things will happen within the lifespan of Jesus' contemporaries (34).
Or maybe not. Jesus was talking about things he knew nothing about (36). (See Mark 13:32.) 24:3-51