Now John answered and said, "Master, we saw someone casting out demons in Your name, and we forbade him because he does not follow with us."
Luke 9:49
Surrounding context
9:48 and said to them, "Whoever receives this little child in My name receives Me; and whoever receives Me receives Him who sent Me. For he who is least among you all will be great."
9:49 Now John answered and said, "Master, we saw someone casting out demons in Your name, and we forbade him because he does not follow with us."
9:50 But Jesus said to him, "Do not forbid him, for he who is not against us is on our side."