Mark 9:33-39

³³And they came to Capernaum; and having come into the house, he asked them, About what were ye disputing on the road?

³⁴But they were silent; for on the road they had been disputing with one another, who was greatest.

³⁵And sitting down, he called the twelve, and saith to them, If any one desire to be first, he will be last of all, and servant of all.

³⁶And he took a child, and placed him in the midst of them, and taking him in his arms, he said to them,

³⁷Whoever receiveth one of these children in my name, receiveth me; and whoever receiveth me, receiveth not me, but him that sent me.

³⁸John said to him, Teacher, we saw one casting out demons in thy name who followeth not us; and we forbade him, because he did not follow us.

³⁹But Jesus said, Forbid him not. For no one, who shall do a miracle in my name, can readily speak evil of me.