Matthew 24:21-25

21For then there will be great suffering unlike anything that has happened from the beginning of the world until now, or ever will happen.

22And if those days had not been cut short, no one would be saved. But for the sake of the elect those days will be cut short.

23Then if anyone says to you, ‘Look, here is the Christ!’ or ‘There he is!’ do not believe him.

24For false messiahs and false prophets will appear and perform great signs and wonders to deceive, if possible, even the elect.

25Remember, I have told you ahead of time.