وَعَنْ أَبِي شُرَيْحٍ الْكَعْبِيِّ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ ضَيْفَهُ جَائِزَتُهُ يَوْمٌ وَلَيْلَةٌ وَالضِّيَافَةُ ثَلَاثَةُ أَيَّامٍ فَمَا بَعْدَ ذَلِكَ فَهُوَ صَدَقَةٌ وَلَا يَحِلُّ لَهُ أَنْ يَثْوِيَ عِنْدَهُ حَتَّى يُحَرِّجَهُ»

Abu Shuraih al-Ka'bi reported God's messenger as saying, "He who believes in God and the last day should honour his guest. Provisions for the road are what will serve for a day and a night; hospitality extends for three days ; what goes beyond that is sadaqa ; and it is not allowable that a guest should stay till he makes himself an encumbrance.'' (Bukhari and Muslim.)