Mark 9:38

And John answered him, saying, Teacher, we saw a certain man, who does not follow us, casting out demons in thy name, and we forbade him, because he does not follow us.

Luke 9:49-50

And having answered, John said, Master, we saw a certain man casting out demons in thy name, and we forbade him, because he does not follow with us.

But there remained two men in the camp, the name of the one was Eldad, and the name of the other Medad. And the Spirit rested upon them. And they were of those who were written, but had not gone out to the tent. And they prophesied

Luke 11:19

And if I cast out the demons by Beelzebub, by whom do your sons cast them out? Because of this 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.