Luke 9:46-50

46And there arose a reasoning among them, which of them was the greatest. 47But when Jesus saw the reasoning of their heart, he took a little child, and set him by his side, 48and said unto them, Whosoever shall receive this little child in my name receiveth me: and whosoever shall receive me receiveth him that sent me: for he that is least among you all, the same is great.

49And John answered and said, Master, we saw one casting out demons in thy name; and we forbade him, because he followeth not with us. 50But Jesus said unto him, Forbid him not: for he that is not against you is for you.