Yahya related to me from Malik from Abu Hazim ibn Dinar from Sahl
ibn Sad al-Ansari that the Messenger of Allah, may Allah bless him and
grant him peace, was brought a drink and he drank some of it. There
was a boy at his right and some old men on his left. He said to the
boy, "Will you give me permission to give it to these people?" The boy
said, "No, Messenger of Allah, I will not prefer anyone to get my
portion from you." He said, "So the Messenger of Allah, may Allah
bless him and grant him peace, placed it in his hand."
Muwatta Malik Book 49, Hadith 18