Luke 9:46-49

And there arose a reasoning among them, which of them was the greatest. But when Jesus saw the reasoning of their heart, he took a little child, and set him by his side, and 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. And John answered and said, Master, we saw one casting out demons in thy name; and we forbade him, because he followeth not with us.