Matthew 24:21-23

Revised Standard Version Catholic Edition

²¹ For then there will be great tribulation, such as has not been from the beginning of the world until now, no, and never will be. ²² And if those days had not been shortened, no human being would be saved; but for the sake of the elect those days will be shortened. ²³ Then if any one says to you, ‘Lo, here is the Christ!’ or ‘There he is!’ do not believe it.