Mark 13:19-23

For those days will be a time of tribulation such as has not occurred since the beginning of the creation which God created until now, and never will. Unless the Lord had shortened those days, no life would have been saved; but for the sake of the elect, whom He chose, He shortened the days. And then if anyone says to you, ‘Behold, here is the Christ’; or, ‘Behold, He is there’; do not believe him; for false Christs and false prophets will arise, and will show signs and wonders, in order to lead astray, if possible, the elect. But take heed; behold, I have told you everything in advance.