My ears heard and my eyes saw the Prophet ﷺ when he spoke, "Anybody who believes in Allah and the Last Day, should serve his neighbor generously, and anybody who believes in Allah and the Last Day should serve his guest generously by giving him his reward." It was asked. "What is his reward, O Messenger of Allah ﷺ?" He said, "(To be entertained generously) for a day and a night with high quality of food and the guest has the right to be entertained for three days (with ordinary food) and if he stays longer, what he will be provided with will be regarded as Sadaqa (a charitable gift). And anybody who believes in Allah and the Last Day should talk what is good or keep quiet (i.e. abstain from all kinds of dirty and evil talks). (Using translation from Bukhārī 6019)
سَمِعَتْ أُذُنَايَ وَأَبْصَرَتْ عَيْنَايَ رَسُولَ اللهِ ﷺ وَهُوَ يَقُولُ مَنْ كَانَ يُؤْمِنُ بِاللهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمَنَّ جَارَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ ضَيْفَهُ جَائِزَتَهُ قِيلَ يَا رَسُولَ اللهِ وَمَا جَائِزَتُهُ؟ قَالَ يَوْمٌ وَلَيْلَةٌ وَالضِّيَافَةُ ثَلَاثَةُ أَيَّامٍ فَمَا كَانَ أَكْثَرَ مِنْ ذَلِكَ فَهُوَ صَدَقَةٌ وَلَا يَثْوِي عِنْدَهُ حَتَّى يُحْرِجَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللهِ وَالْيَوْمِ الْآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ