The Messenger of Allah ﷺ was brought milk that had been mixed with water. To his right was a bedouin Arab and to his left was Abu Bakr. He drank, then gave it to the bedouin and said, "The one on the right, then the one on the right."
حدثنا إسماعيل قال حدثني مالك عن ابن شهاب
أن رسول الله ﷺ أتي بلبن قد شيب بماء وعن يمينه أعرابي وعن شماله أبو بكر فشرب ثم أعطى الأعرابي وقال الأيمن فالأيمن