Sayyiduna Abdullah bin Umar (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "When one of you eats, let him eat with his right hand, and when he drinks, let him drink with his right hand, for Shaytan eats and drinks with his left hand."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14609
Sayyiduna Abdullah bin Umar (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "When one of you eats and drinks, let him do so with his right hand, for Shaytan eats and drinks with his left hand."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14610
Iyas bin Salamah bin al-Akwa' narrates from his father (Sayyiduna Salamah bin al-Akwa' (may Allah be pleased with him)) that the Messenger of Allah (peace and blessings be upon him) saw Bishr bin Ra'i al-'Ir eating with his left hand. He (peace and blessings be upon him) said: "Eat with your right hand." He said: "I cannot." He (peace and blessings be upon him) said: "May you not be able to." After that his hand never reached his mouth.
(b) In the narration of al-Sulami: his (right) hand never reached (his mouth).
(c) In Sahih Muslim, through another chain, Ikrimah (may Allah have mercy on him) relates that it was only pride that prevented him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14611