Mark 13:19-23

19because those will be days of distress unequaled from the beginning, when God created the world, until now—and never to be equaled again. 20“If the Lord had not cut short those days, no one would survive. But for the sake of the elect, whom he has chosen, he has shortened them. 21At that time if anyone says to you, ‘Look, here is the Messiah!’ or, ‘Look, there he is!’ do not believe it. 22For false messiahs and false prophets will appear and perform signs and wonders to deceive, if possible, even the elect.

23So be on your guard; I have told you everything ahead of time.