The Messenger of Allah ﷺ came to us in this house of ours and asked for something to drink. We milked one of our sheep for him, then I mixed it with water from this well of ours and handed it to him. Abu Bakr was on his left, Umar was facing him, and an Arabi was on his right.When he finished drinking, Umar said, "This is Abu Bakr."But he gave what was left to the Arabi, then said, "Those on the right, those on the right. Begin with those on the right."Anas said, "So this is the sunnah, this is the sunnah, this is the sunnah," repeating it three times.
حدثنا خالد بن مخلد حدثنا سليمان بن بلال قال حدثني أبو طوالة اسمه عبد الله بن عبد الرحمن قال سمعت
أتانا رسول الله ﷺ في دارنا هذه فاستسقى فحلبنا له شاة لنا ثم شبته من ماء بئرنا هذه فأعطيته وأبو بكر عن يساره وعمر تجاهه وأعرابي عن يمينه فلما فرغ قال عمر هذا أبو بكر فأعطى الأعرابي فضله ثم قال الأيمنون الأيمنون ألا فيمنوا قال أنس فهي سنة فهي سنة ثلاث مرات