Mark 13:19-23

For in those days there will be tribulation, such as has not been since the beginning of the creation which God created until this time, nor ever shall be. And unless the Lord had shortened those days, no flesh would be saved; but for the elect’s sake, whom He chose, He shortened the days. “Then if anyone says to you, ‘Look, here is the Christ!’ or, ‘Look, He is there!’ do not believe it. For false christs and false prophets will rise and show signs and wonders to deceive, if possible, even the elect. But take heed; see, I have told you all things beforehand.