It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him); he said: A drink was brought to the Messenger of Allah (peace and blessings be upon him). The elders were on his left, and a boy, the youngest of the people, was on his right. He (peace and blessings be upon him) said to the boy: "Do you permit me to give it to the elders?" He said: "I will not give preference to anyone over myself in my share from you." The narrator said: So he (peace and blessings be upon him) gave it to him.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5967