Mark 9:32-35

32But they did not understand what he meant and were afraid to ask him about it. 33They came to Capernaum. When he was in the house, he asked them, “What were you arguing about on the road?”

34But they kept quiet because on the way they had argued about who was the greatest.

35Sitting down, Jesus called the Twelve and said, “Anyone who wants to be first must be the very last, and the servant of all.”