Musnad Ahmad 1013:70

Musa ibn Dawud narrated to us, he said: It was read to Malik: Abu Hazim, from Sahl ibn Sa’d, that the Prophet, peace and blessings of Allah be upon him, was brought a drink, and he drank from it. To his right was a young boy, and to his left were the elders. He said to the young boy: "Do you permit me to give it to these people?" The boy said: "By Allah, O Messenger of Allah, I would not prefer anyone over my share from you."