English Translation
Narrated Anas bin Malik: I saw Allah's Apostle drinking milk. He came to my house and I milked a sheep and then mixed the milk with water from the well for Allah's Apostle. He took the bowl and drank while on his left there was sitting Abu Bakr, and on his right there was a bedouin. He then gave the remaining milk to the bedouin and said, "The right! The right (first)."
This hadith is from Sahih al-Bukhari, the most rigorously authenticated collection in Islamic scholarship. No editorial opinion is added.