حَدَّثَنَا مُسَدَّدٌ، وَخَلَفُ بْنُ هِشَامٍ، قَالاَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ مَنْصُورٍ، عَنْ عَامِرٍ، عَنْ أَبِي كَرِيمَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لَيْلَةُ الضَّيْفِ حَقٌّ عَلَى كُلِّ مُسْلِمٍ فَمَنْ أَصْبَحَ بِفِنَائِهِ فَهُوَ عَلَيْهِ دَيْنٌ إِنْ شَاءَ اقْتَضَى وَإِنْ شَاءَ تَرَكَ ‏"‏ ‏.‏

Narrated AbuKarimah: The Prophet (PBUH) said: It is a duty of every Muslim (to provide hospitality) to a guest for a night. If anyone comes in the morning to his house, it is a debt due to him. If he wishes, he may fulfil it, and if he wishes he may leave it. Translation Not Available

Book Ref: Sunan Abi Dawud Book 28 Hadith 3750
Web Ref:  Sunan Abi Dawud Book 27 Hadith 3741