Luke 9:49 in the King James Version
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.
Context
48 and said to them, “Whoever receives this little child in my name receives me. Whoever receives me receives him who sent me. For whoever is least among you all, this one will be great.”
49 John answered, “Master, we saw someone casting out demons in your name, and we forbade him, because he doesn’t follow with us.”
50 Jesus said to him, “Don’t forbid him, for he who is not against us is for us.”