The younger should serve the older
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا مُعْتَمِرٌ، عَنْ أَبِيهِ، قَالَ سَمِعْتُ أَنَسًا ـ رضى الله عنه ـ قَالَ كُنْتُ قَائِمًا عَلَى الْحَىِّ أَسْقِيهِمْ ـ عُمُومَتِي وَأَنَا أَصْغَرُهُمُ ـ الْفَضِيخَ، فَقِيلَ حُرِّمَتِ الْخَمْرُ. فَقَالَ أَكْفِئْهَا. فَكَفَأْنَا. قُلْتُ لأَنَسٍ مَا شَرَابُهُمْ قَالَ رُطَبٌ وَبُسْرٌ. فَقَالَ أَبُو بَكْرِ بْنُ أَنَسٍ وَكَانَتْ خَمْرَهُمْ. فَلَمْ يُنْكِرْ أَنَسٌ. وَحَدَّثَنِي بَعْضُ أَصْحَابِي أَنَّهُ سَمِعَ أَنَسًا يَقُولُ كَانَتْ خَمْرَهُمْ يَوْمَئِذٍ.
Narrated Anas: I was waiting on my uncles, serving them with an alcoholic drink prepared from dates, and I was the youngest of them. (Suddenly) it was said that alcoholic drinks had been prohibited. So they said (to me), 'Throw it away." And I threw it away The sub-narrator said: I asked Anas what their drink was (made from), He replied, "(From) ripe dates and unripe dates."