Matthew 24:21-23

21For at that time there will be a great tribulation (pressure, distress, oppression), such as has not occurred since the beginning of the world until now, nor ever will [again].

22And if those days [of tribulation] had not been cut short, no human life would be saved; but for the sake of the elect (God’s chosen ones) those days will be shortened.

23Then if anyone says to you [during the great tribulation], ‘Look! Here is the Christ,’ or ‘There He is,’ do not believe it.