"Then if anyone says to you, "Look, here is the Christ!' or, "Look, He is there!' do not believe it.
Mark 13:21
Surrounding context
13:20 And unless the Lord had shortened those days, no flesh would be saved; but for the elect's sake, whom He chose, He shortened the days.
13:21 "Then if anyone says to you, "Look, here is the Christ!' or, "Look, He is there!' do not believe it.
13:22 For false christs and false prophets will rise and show signs and wonders to deceive, if possible, even the elect.