Muslim

Anas bin Malik (RA) reported that there was brought to Allah's Messenger (ﷺ) a cup of milk mixed with water, while there was on his right a desert Arab and on his left Abu Bakr. He (the Holy Prophet) drank; he then gave it to the desert Arab and said: (Give to one) who is on the right, then again who is on the right.

Anas reported: The Apostle of Allah (ﷺ) (may peace he upon him) came to Madinah when I was ten years old and he died when I was twenty years old. My mother exhorted me to serve him. He (the Holy Prophet) came to our house, and we ruined a flabby goat for him and mixed it (the milk) with water from the well of the house. Allah's Messenger (ﷺ) drank that. Umar and Abu Bakr (RA) on his left side said to him: Allah's Messenger, give it to Abu Bakr, but he (the Holy Prophet) gave it to the desert Arab who was on his right. Allah's Messenger (ﷺ) said: He who is on the right, then he who is on the right.

Yahya ibn Ayyub, Qutaybah, and Ali ibn Hujr narrated to us, they said: Isma'il, who is Ibn Ja'far, narrated to us, from Abdullah ibn Abdur-Rahman ibn Ma'mar ibn Hazm Abu Tuwalah al-Ansari, that he heard Anas ibn Malik. And Abdullah ibn Maslamah ibn Qa'nab narrated to us—and the wording is his—he said: Sulaiman, meaning Ibn Bilal, narrated to us, from Abdullah ibn Abdur-Rahman, that he heard Anas ibn Malik narrate, he said: The Messenger of Allah, peace and blessings be upon him, came to us in our house and asked for a drink, so we milked a sheep for him, then I mixed it with water from this well of mine. He said: I gave it to the Messenger of Allah, peace and blessings be upon him, and the Messenger of Allah, peace and blessings be upon him, drank, and Abu Bakr was on his left, and Umar was facing him, and a Bedouin was on his right. When the Messenger of Allah, peace and blessings be upon him, finished drinking, Umar said: This is Abu Bakr, O Messenger of Allah, pointing him out to him. But the Messenger of Allah, peace and blessings be upon him, gave it to the Bedouin and left Abu Bakr and Umar. And the Messenger of Allah, peace and blessings be upon him, said: "The rightmost, the rightmost, the rightmost." Anas said: So it is a Sunnah, so it is a Sunnah, so it is a Sunnah.

Sahl bin Sa'd Sa'idi reported that Allah's Messenger (ﷺ) was given a drink, and he drank from that, and there was on his right side a boy, and on his left some old men. He said to the boy: Do you permit me to give it to them (the old men), but that boy said: by God. I will not give preference at your hand over me in my share. He (the narrator) said that Allah's Messenger (ﷺ) then gave it in his hand.

This hadith is reported on the authority of Sahl bin Sa'd with a slight variation of wording.