Hadith 294
“Milk mixed with water was brought to the Messenger of Allah (ﷺ). On his right side was sitting a Bedouin and on his left was sitting Abu Bakr (رضي الله عنه). The Prophet (ﷺ) drank from it and handed the rest to the Bedouin saying, "One who is on the right has preference, then again the one who is on the right.”
Anas (رضي الله عنه)Riyad as-Salihin 759Adab of Eating