Mark 13:21-23 (New International Version)

²¹At that time if anyone says to you, 'Look, here is the Christ^[a]!' or, 'Look, there he is!' do not believe it. ²²For false Christs and false prophets will appear and perform signs and miracles to deceive the elect—if that were possible. ²³So be on your guard; I have told you everything ahead of time.