Sahih Muslim Book - 1, Hadith - 176

حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ وَمُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ جَمِيعًا عَنْ ابْنِ عُيَيْنَةَ قَالَ ابْنُ نُمَيْرٍ حَدَّثَنَا سُفْيَانُ عَنْ عَمْرٍو أَنَّهُ سَمِعَ نَافِعَ بْنَ جُبَيْرٍ يُخْبِرُ عَنْ أَبِي شُرَيْحٍ الْخُزَاعِيِّ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُحْسِنْ إِلَى جَارِهِ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ ضَيْفَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَسْكُتْ.

It was narrated from 'Amr that he heard Nafi' bin Jubair tell him, narrating from Abu Shuraih Al-Khuza'i, that the Prophet (s.a.w) said: "Whoever believes in Allah and the Last Day, let him treat his neighbor well; whoever believes in Allah and the Last Day, let him honor his guest; whoever believes in Allah and the Last Day, let him speak good or else remain silent."