Sahih al-Bukhari 5612

ʿAbdān narrated to us: ʿAbd Allāh informed us: Yūnus informed us, from al-Zuhrī, who said: Anas ibn Mālik (may Allah be pleased with him) informed me that he saw the Messenger of Allah ﷺ drink milk. He came to Anas’s home, and Anas milked a sheep and mixed the milk for the Messenger of Allah ﷺ with water from the well. He took the cup and drank. Abū Bakr was on his left and a Bedouin on his right, so he gave the remainder to the Bedouin. Then he said, “The one on the right, then the one on the right.”