The Prophet ﷺ said, "The right of hospitality is three days. Whatever the guest receives beyond that is charity."
حدثنا روح حدثنا هشام عن محمد
عن النبي ﷺ قال حق الضيافة ثلاثة أيام فما أصاب بعد ذلك فهو صدقة
Its isnad is sahih. It has already been mentioned at .