Sahih
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا سُفْيَانُ، عَنْ مَنْصُورٍ، عَنِ الشَّعْبِيِّ، عَنِ الْمِقْدَامِ أَبِي كَرِيمَةَ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " لَيْلَةُ الضَّيْفِ وَاجِبَةٌ فَإِنْ أَصْبَحَ بِفِنَائِهِ فَهُوَ دَيْنٌ عَلَيْهِ فَإِنْ شَاءَ اقْتَضَى وَإِنْ شَاءَ تَرَكَ " .
It was narrated that Miqdam Abu Karimah said:"The Messenger of Allah(ﷺ) said: ' Putting up a guest for one night is obligatory. If you find a guest at your door in the morning, then this (hospitality) is (like) a debt that you (the host) owe him. If he (the guest) wants, he may request it, and if he wants, he may leave it