Mark 13:5-6

13:5 Jesus began to say to them, “Watch out that no one misleads you. 13:6 Many will come in my name, saying, ‘I am he,’ and they will mislead many.

Mark 13:21-23

13:21 Then if anyone says to you, ‘Look, here is the Christ!’ or ‘Look, there he is!’ do not believe him. 13:22 For false messiahs and false prophets will appear and perform signs and wonders to deceive, if possible, the elect. 13:23 Be careful! I have told you everything ahead of time.