Anas (May Allah be pleased with him) reported:
Milk mixed with water was brought to Messenger of Allah ﷺ. On his right side was sitting a bedouin and on his left was sitting Abu Bakr (May Allah be pleased with him). He 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."

[Al-Bukhari and Muslim].

وعن أنس رضى الله عنه أن رسول الله ﷺ أتى بلبن قد شيب بماء، وعن يمينه أعرابي، وعن يساره أبو بكر رضى الله عنه ، فشرب، ثم أعطى الأعرابي وقال: "الأيمن فالأيمن" . (3).