Volume 3, Book 40, Number 554:
Narrated Sahl bin Sad:
Once a tumbler (full of milk or water) was brought to Allah’s Apostle who drank from it, while on
his right side there was sitting a boy who was the youngest of those who were present, and on his left
side there were old men. The Prophet asked, “O boy ! Do you allow me to give (the drink) to the elder
people (first)?” The boy said, “I will not prefer anybody to have my share from you, O Allah’s
Apostle!” So, he gave it to the boy.