Mark 9:38

John said to Him, “Teacher, we saw someone casting out demons in Your name, and we tried to stop him because he was not accompanying us [as Your disciple].”

Luke 9:49-50

John replied, “Master, we saw someone driving out demons in Your name; and we tried to stop him because he does not follow along with us.”

But two men had remained in the camp; one named Eldad and the other named Medad. The Spirit rested upon them (now they were among those who had been registered, but had not gone out to the Tent), and they prophesied in the camp.

Luke 11:19

Now if I drive out the demons by Beelzebul, by whom do your sons [the Jewish exorcists] drive them out? For this reason they will be your judges.

Treasury of Scripture Knowledge

Summary

Mark 9:38

And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbad him, because he followeth not us.