It is narrated from Sayyiduna Abu Karima Miqdam Shami (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "If a guest arrives at night, it is obligatory upon every Muslim to host him for that night. And if the guest stays until morning, then the hospitality for that time is a debt upon the householder; if the guest wishes, he may demand it, and if he wishes, he may forgo it."