Hazrat Anas (may Allah be pleased with him) narrated that once the Noble Messenger (peace and blessings be upon him) came to our house and asked for water. We had a goat, which we washed. Then I mixed water from the same well in it and presented it (as lassi) to the Prophet (peace and blessings be upon him). Hazrat Abu Bakr (may Allah be pleased with him) was sitting to his left, Hazrat Umar (may Allah be pleased with him) was in front, and a Bedouin was on his right. When the Prophet (peace and blessings be upon him) finished drinking, some milk was left in the bowl, so Hazrat Umar (may Allah be pleased with him) suggested that it be given to Hazrat Abu Bakr (may Allah be pleased with him), but the Prophet (peace and blessings be upon him) gave it to the Bedouin (because he was on the right side). Then the Prophet (peace and blessings be upon him) said: The one sitting on the right, the one sitting on the right has the right. So beware! Always start from the right side. Anas (may Allah be pleased with him) said: This is the Sunnah, this is the Sunnah. Three times Hazrat Anas (may Allah be pleased with him) repeated this statement.