Sunan Abi Dawud — Foods (Kitab Al-At'imah) — Hadith No: 3750
Translation
Narrated AbuKarimah: The Prophet (ﷺ) 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