Abu Juhayfah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "I am not one who eats while reclining." It is reported from him (peace and blessings be upon him) that he (peace and blessings be upon him) would eat while sitting and would say: "I am a servant; I eat just as a servant eats."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14651