Mark 9:34-37

No one said a word, because they had been arguing about which one of them was the greatest. Jesus sat down, called the twelve disciples to come around him, and said to them, “If anyone wants to be first, he must be content to be last and become a servant to all.” Then he had a child come and stand among them. He wrapped the child in his arms and said to them, “Whoever welcomes a little child in my name welcomes me. And whoever welcomes me welcomes not only me, but the one who sent me.”