Hadith 895
وعنه رضي الله عنه قال : قال رسول الله صلى الله عليه وآله وسلم : « إذا دعي أحدكم فليجب ، فإن كان صائما ، فليصل ، وإن كان مفطرا فليطعم ». أخرجه مسلم أيضا. وله من حديث جابر نحوه وقال : « إن شاء طعم وإن شاء ترك».
Narrated [Abu Hurairah (RA)]: Allah's Messenger (ﷺ), "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)."
