Pass drinks to the right first

أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أُتِيَ بِلَبَنٍ قَدْ شِيبَ بِمَاءٍ، وَعَنْ يَمِينِهِ أَعْرَابِيٌّ وَعَنْ شِمَالِهِ أَبُو بَكْرٍ، فَشَرِبَ، ثُمَّ أَعْطَى الأَعْرَابِيَّ، وَقَالَ ‏ "‏ الأَيْمَنَ الأَيْمَنَ ‏"‏‏.

“Milk mixed with water was brought to Allah's Messenger ﷺ while a bedouin was on his right and Abu Bakr was on his left. He drank (of it) and then gave (it) to the bedouin and said, 'The right" "The right (first)”

أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أُتِيَ بِشَرَابٍ فَشَرِبَ مِنْهُ، وَعَنْ يَمِينِهِ غُلاَمٌ وَعَنْ يَسَارِهِ الأَشْيَاخُ‏.‏ فَقَالَ لِلْغُلاَمِ ‏ "‏ أَتَأْذَنُ لِي أَنْ أُعْطِيَ هَؤُلاَءِ ‏"‏‏.‏ فَقَالَ الْغُلاَمُ وَاللَّهِ يَا رَسُولَ اللَّهِ لاَ أُوثِرُ بِنَصِيبِي مِنْكَ أَحَدًا‏.‏ قَالَ فَتَلَّهُ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي يَدِهِ‏.

“Allah's Messenger ﷺ was offered something to drink. He drank of it while on his right was a boy and on his left were some elderly people. He said to the boy, "May I give these (elderly) people first?" The boy said, "By Allah, O Allah's Messenger ﷺ! I will not give up my share from you to somebody else." On that Allah's Messenger ﷺ placed the cup in the hand of that boy”