Abu Huraira reported God’s messenger as saying, "He who believes in God and the last day should honour his guest; he who believes in God and the last day should not annoy his neighbour ; and he who believes in God and the last day should say what is good, or keep silent." In a version instead of speaking of the neighbour he said, "He who believes in God and the last day should join ties of relationship." (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ ضَيْفَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلَا يُؤْذِ جَارَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ» . وَفِي رِوَايَةٍ: بَدَلَ «الْجَارِ» وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيَصِلْ رحِمَه "
sunnah.com