Luke 9:49

49 “Master,” said John, “we saw someone driving out demons in your name and we tried to stop him, because he is not one of us.”

Read Luke 9:49 Using Other Translations

And John answered and said, Master, we saw one casting out devils in thy name; and we forbad him, because he followeth not with us.
John answered, "Master, we saw someone casting out demons in your name, and we tried to stop him, because he does not follow with us."
John said to Jesus, “Master, we saw someone using your name to cast out demons, but we told him to stop because he isn’t in our group.”