Musnad Ahmad 30:1469

Abdullah ibn al-Harith narrated to us, from Ibn Jurayj, who said: Nu'man—meaning Ibn Rashid al-Jazari—informed me, from Ibn Shihab, from Ibn al-Musayyib, from Abu Hurairah, that the Prophet, may God bless him and grant him peace, said: "When one of you eats, let him eat with his right hand, and let him drink with his right hand, for the devil eats with his left hand and drinks with his left hand."