Sahih al-Bukhari, Volume 3, Book 47, Hadith 776 (USC-MSA) ⓘ

Narrated Sahl bin Sa`d: A drink (of milk and water) was brought to Allah's Messenger while a boy was sitting on his right side and old men were sitting on his left side. He asked the boy, "Will you allow me to give it to these (people)?" The boy said, "No, by Allah, I will not allow anyone to take my right from you." Then the Prophet put the bowl in the boy's hand.

حَدَّثَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أُتِيَ بِشَرَابٍ، وَعَنْ يَمِينِهِ غُلاَمٌ وَعَنْ يَسَارِهِ أَشْيَاخٌ، فَقَالَ لِلْغُلاَمِ ‏ "‏ أَتَأْذَنُ لِي أَنْ أُعْطِيَ هَؤُلاَءِ ‏" ‏‏.‏ فَقَالَ الْغُلاَمُ لاَ، وَاللَّهِ لاَ أُوثِرُ بِنَصِيبِي مِنْكَ أَحَدًا‏.‏ فَتَلَّهُ فِي يَدِهِ‏.‏