Luke 9:46-50

Then a dispute arose among them as to which of them would be greatest. And Jesus, perceiving the thought of their heart, took a little child and set him by Him, 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.” 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.” But Jesus said to him, “Do not forbid him, for he who is not against us is on our side.”