Musnad Abu Ya'la al-Mawsili 109:260

Kamil narrated to us, Layth ibn Sa'd narrated to us, he said: And Abu al-Zubayr said that Jabir said: Indeed, the Messenger of Allah (may Allah bless him and grant him peace) said: "Do not eat with the left [hand], for indeed the devil eats with the left [hand]."