Mark 13:21

21 "Then, if anyone says to you, "Look, here is the Messiah!' or, "Look, there he is!' - do not believe it.

Mark 13:21 In-Context

19 For the trouble of those days will be far worse than any the world has ever known from the very beginning when God created the world until the present time. Nor will there ever be anything like it again.
20 But the Lord has reduced the number of those days; if he had not, nobody would survive. For the sake of his chosen people, however, he has reduced those days.
21 "Then, if anyone says to you, "Look, here is the Messiah!' or, "Look, there he is!' - do not believe it.
22 For false Messiahs and false prophets will appear. They will perform miracles and wonders in order to deceive even God's chosen people, if possible.
23 Be on your guard! I have told you everything ahead of time.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.