Sahih al-Bukhari Book 74, Hadith 46
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.
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).
The Prophet (ﷺ) and one of his companions entered upon an Ansari man. The Prophet (ﷺ) and his companion greeted (the man) and he replied, "O Allah's Messenger (ﷺ)! Let my father and mother be sacrificed for you! It is hot," while he was watering his garden. The Prophet (ﷺ) asked him, "If you have water kept overnight in a water skin, (give us), or else we will drink by putting our mouths in the basin." The man was watering the garden The man said, "O Allah's Messenger (ﷺ)! I have water kept overnight in a water-skin. He went to the shade and poured some water into a bowl and milked some milk from a domestic goat in it. The Prophet (ﷺ) drank and then gave the bowl to the man who had come along with him to drink.