Mark 13:19-22

for at that time there will be such tribulation as has not occurred, from the beginning of the creation which God made, until now—and never will [be again]. And if the Lord had not shortened the days, no human life would have been saved; but for the sake of the elect, whom He chose [for Himself], He shortened the days. [Dan 12:1] Then if anyone says to you, ‘Look, here is the Christ (the Messiah, the Anointed)!’ or, ‘Look, He is there!’ do not believe it; for false Christs and false prophets will arise, and they will provide signs and wonders in order to deceive, if [such a thing were] possible, even the elect [those God has chosen for Himself].