Mark 9:33-35

He came to Capernaum, and when he was in the house he asked them, “What were you arguing among yourselves on the way?”

But they were silent, for they had disputed one with another on the way about who was the greatest.

He sat down, and called the twelve; and he said to them, “If any man wants to be first, he shall be last of all, and servant of all.”