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.

حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ ـ رضى الله عنه ـ قَالَ أُتِيَ رَسُولُ اللَّهِ ﷺ بِقَدَحٍ فَشَرِبَ وَعَنْ يَمِينِهِ غُلاَمٌ، هُوَ أَحْدَثُ الْقَوْمِ، وَالأَشْيَاخُ عَنْ يَسَارِهِ قَالَ " يَا غُلاَمُ أَتَأْذَنُ لِي أَنْ أُعْطِيَ الأَشْيَاخَ ". فَقَالَ مَا كُنْتُ لأُوثِرَ بِنَصِيبِي مِنْكَ أَحَدًا يَا رَسُولَ اللَّهِ. فَأَعْطَاهُ إِيَّاهُ.