Not graded
Al-Adab al-Mufrad 109
حَدَّثَنَا الْحُسَيْنُ بْنُ حُرَيْثٍ، قَالَ: حَدَّثَنَا الْفَضْلُ بْنُ مُوسَى، عَنِ الْوَلِيدِ بْنِ دِينَارٍ، عَنِ الْحَسَنِ، أَنَّهُ سُئِلَ عَنِ الْجَارِ، فَقَالَ: أَرْبَعِينَ دَارًا أَمَامَهُ، وَأَرْبَعِينَ خَلْفَهُ، وَأَرْبَعِينَ عَنْ يَمِينِهِ، وَأَرْبَعِينَ عَنْ يَسَارِهِ.
Al-Hasan was asked about the neighbour and said, "The term 'neighbour' includes the forty houses in front a person, the forty houses behind him, the forty houses on his right and the forty houses on his left."
Cited in Al-Adab al-Mufrad (No. 109).