Mark 13:19-23

For those days will be such a time of tribulation as has not occurred since the beginning of the creation which God created until now, and never will again.

And if the Lord had not 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, ‘Look, here is the Christ’; or, ‘Look, there He is’; do not believe it;

for false christs and false prophets will arise, and will provide signs and wonders, in order to mislead, if possible, the elect.

But beware; I have told you everything in advance. The Return of Christ