Musnad Abu Ya'la al-Mawsili 148:23

Abu Bakr ibn Abi Shaybah narrated to us, Yazid ibn Harun narrated to us, from Hisham ibn Hassan, from Abdullah ibn Dihqan, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "If one of you eats, let him eat with his right hand, and let him drink with his right hand, for indeed, Satan eats with his left hand and drinks with his left hand."