Markus 9:39

9:39 But Jesus said, “Do not stop him, because no one who does a miracle in my name will be able soon afterward to say anything bad about me.

Markus 13:22

13:22 For false messiahs ¹  and false prophets will appear and perform signs and wonders to deceive, if possible, the elect.

[13:22]  ¹ tn Or “false christs”; both “Christ” (Greek) and “Messiah” (Hebrew and Aramaic) mean “one who has been anointed.”