Sunan Ibn Majah 3675
سنن ابن ماجه#3675SahihIt was narrated from Abu Shuraih Al-Khuza'i that the Messenger of Allah(ﷺ) said:"Whoever believes in the Last Day, let him honor his guest, and grant him reward for a day and a night. And it is not permissible for him to stay so long that he causes annoyance to his host. Hospitality is for three days, and whatever he spends on him after three days is charity
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih
In-book reference: 33:19