Mark 9:33-39

³³And he came to Capernaum: and being in the house he asked them, What was it that ye disputed among yourselves by the way?

³⁴But they held their peace: for by the way they had disputed among themselves, who should be the greatest.

³⁵And he sat down, and called the twelve, and saith unto them, If any man desire to be first, the same shall be last of all, and servant of all.

³⁶And he took a child, and set him in the midst of them: and when he had taken him in his arms, he said unto them,

³⁷Whosoever shall receive one of such children in my name, receiveth me: and whosoever shall receive me, receiveth not me, but him that sent me.

³⁸And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbad him, because he followeth not us.

³⁹But Jesus said, Forbid him not: for there is no man which shall do a miracle in my name, that can lightly speak evil of me.