Chapter: It is recommended to pass water and milk etc., to the right of the one who drinks first
Anas b. Malik reported that there was brought to Allah's Messenger ( صلی اللہ علیہ وسلم ) a cup of milk mixed with water, while there was on his right a desert Arab and on his left Abu Bakr. He (the Holy Prophet) drank; he then gave it to the desert Arab and said: (Give to one) who is on the right, then again who is on the right.
Authentic