Sahih al-Bukhari 6015

Arabic

حَدَّثَنَا مُحَمَّدُ بْنُ مِنْهَالٍ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، حَدَّثَنَا عُمَرُ بْنُ مُحَمَّدٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَا زَالَ جِبْرِيلُ يُوصِينِي بِالْجَارِ حَتَّى ظَنَنْتُ أَنَّهُ سَيُوَرِّثُهُ ‏"‏‏.‏

English translation

Narrates Ibn `Umar:Allah's Apostle said, Gabriel kept on recommending me about treating the neighbors in a kind and polite manner, so much so that I thought that he would order (me) to make them (my) heirs

Reference: Sahih al-Bukhari 6015, Book of Good Manners and Form (Al-Adab). English translation by Dr. Muhammad Muhsin Khan.