Anas bin Malik reported,

The Prophet ﷺ arrived in Madinah when I was ten years old, and he passed away when I was twenty. My mothers used to urge me to serve him. He came into our house, so we milked a domestic sheep for him, and the milk was mixed with water from a well in the house. The Messenger of Allah ﷺ drank from it. Umar said to him, while Abu Bakr was on his left, "Messenger of Allah, give it to Abu Bakr."But he gave it to a Bedouin Arabi who was on his right, and the Messenger of Allah ﷺ said, "Those on the right, then those on the right."

Azami 14410

Sahih

عن أنس، قال

قدم النبي ﷺ المدينة وأنا ابن عشر، ومات وأنا ابن عشرين، وكن أمهاتي يحثثنني على خدمته، فدخل علينا دارنا فحلبنا له من شاة داجن، وشيب له من بئر في الدار، فشرب رسول الله ﷺ فقال له عمر، وأبو بكر عن شماله: يا رسول الله، أعط أبا بكر، فأعطاه أعرابيا عن يمينه، وقال رسول الله ﷺ: الأيمن فالأيمن.

الأعظمي 14410صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Superior moral conduct
Chapter
Etiquette of eating and drinking
Section
Beginning with the elder when serving drinks, then with those on his right
Numbering
Jami al-Kamil 14410 (2nd edition)