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).  

سَمِعَتْ أُذُنَاىَ وَأَبْصَرَتْ عَيْنَاىَ حِينَ تَكَلَّمَ النَّبِيُّ ﷺ فَقَالَ مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيُكْرِمْ جَارَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيُكْرِمْ ضَيْفَهُ جَائِزَتَهُ قَالَ وَمَا جَائِزَتُهُ يَا رَسُولَ اللَّهِ قَالَ يَوْمٌ وَلَيْلَةٌ وَالضِّيَافَةُ ثَلاَثَةُ أَيَّامٍ فَمَا كَانَ وَرَاءَ ذَلِكَ فَهْوَ صَدَقَةٌ عَلَيْهِ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ  

Messenger of Allah ﷺ said, Whoever believes in Allah and the Last Day, should serve his guest generously. The guest's reward is: To provide him with a superior type of food for a night and a day and a guest is to be entertained with food for three days, and whatever is offered beyond that, is regarded as something given in charity. And it is not lawful for a guest to stay with his host for such a long period so as to put him in a critical position." Narrated Malik: Similarly as above (156) adding, "Who believes in Allah and the Last Day should talk what is good or keep quiet." (i.e. abstain from dirty and evil talk, and should think before uttering).  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيُكْرِمْ ضَيْفَهُ جَائِزَتُهُ يَوْمٌ وَلَيْلَةٌ وَالضِّيَافَةُ ثَلاَثَةُ أَيَّامٍ فَمَا بَعْدَ ذَلِكَ فَهْوَ صَدَقَةٌ وَلاَ يَحِلُّ لَهُ أَنْ يَثْوِيَ عِنْدَهُ حَتَّى يُحْرِجَهُ حَدَّثَنَا إِسْمَاعِيلُ قَالَ حَدَّثَنِي مَالِكٌ مِثْلَهُ وَزَادَ مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ  

We said to the Prophet, "You send us out and it happens that we have to stay with people who do not entertain us. What do you think about it? He said to us, "If you stay with some people and they entertain you as they should for a guest, accept their hospitality, but if they don't, take the right of the guest from them."  

قُلْنَا لِلنَّبِيِّ ﷺ إِنَّكَ تَبْعَثُنَا فَنَنْزِلُ بِقَوْمٍ لاَ يَقْرُونَا فَمَا تَرَى فِيهِ فَقَالَ لَنَا إِنْ نَزَلْتُمْ بِقَوْمٍ فَأُمِرَ لَكُمْ بِمَا يَنْبَغِي لِلضَّيْفِ فَاقْبَلُوا فَإِنْ لَمْ يَفْعَلُوا فَخُذُوا مِنْهُمْ حَقَّ الضَّيْفِ