Sahih Bukhari – Hadith No : 6204

Narrated Abu Shuraih Al-Ka`bi: Allah’s Apostle said, Whoever believes in Allah and the Last Day, should serve his guest generously. The guest’s reward is: To provide him with a superior type of food for a night and a day and a guest is to be entertained with food for three days, and whatever is offered beyond that, is regarded as something given in charity. And it is not lawful for a guest to stay with his host for such a long period so as to put him in a critical position.”

Hadith In Arabic Text :

حدثنا عبد الله بن يوسف، أخبرنا مالك، عن سعيد بن أبي سعيد المقبري، عن أبي شريح الكعبي، أن رسول الله صلى الله عليه وسلم قال ‏”‏ من كان يؤمن بالله واليوم الآخر فليكرم ضيفه، جائزته يوم وليلة، والضيافة ثلاثة أيام، فما بعد ذلك فهو صدقة، ولا يحل له أن يثوي عنده حتى يحرجه ‏”‏‏.‏

Chapter : Good Manners and Form (Al-Adab) – كتاب الأدب