Narrated [Abu Hurairah (RA)] : Allah's Messenger ( صلی اللہ علیہ وسلم ), "When one of you is invited (to a meal) he must accept. If he is fasting he should pray (i.e. make supplication for the host) and if he is not fasting he should eat." [Muslim reported it too] . Muslim has something similar to the above from the Hadith of Jabir (RA), it goes: "If he wishes he may eat, and if he wishes he may leave (the food alone)."