Sahih al-Bukhari 6981Book 90, Hadith 28
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ سُفْيَانَ، قَالَ حَدَّثَنِي إِبْرَاهِيمُ بْنُ مَيْسَرَةَ، عَنْ عَمْرِو بْنِ الشَّرِيدِ، أَنَّ أَبَا رَافِعٍ، سَاوَمَ سَعْدَ بْنَ مَالِكٍ بَيْتًا بِأَرْبَعِمِائَةِ مِثْقَالٍ وَقَالَ لَوْلاَ أَنِّي سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " الْجَارُ أَحَقُّ بِصَقَبِهِ ". مَا أَعْطَيْتُكَ.
Abu Rafi` sold a house to Sa`d bin Malik for four-hundred Mithqal of gold, and said, "If I had not heard the Prophet (ﷺ) saying, 'The neighbor has more right to be taken care of by his neighbor (than anyone else),' then I would not have sold it to you."