كتاب البيوع
Read the English translation first, with the original Arabic directly underneath.
It was narrated from Abu Hurairah that the Prophet (ﷺ) said:
"No tow-dweller should sell for desert-dweller, no man should outbid his brother; and no woman should ask for her sister (in faith) to be divorced so as to turn over what is in her bowl (deprive her of her share of maintenance)"
لاَ يَبِيعُ حَاضِرٌ لِبَادٍ وَلاَ تَنَاجَشُوا وَلاَ يَزِيدُ الرَّجُلُ عَلَى بَيْعِ أَخِيهِ وَلاَ تَسْأَلُ الْمَرْأَةُ طَلاَقَ أُخْتِهَا لِتَسْتَكْفِئَ بِهِ مَا فِي صَحْفَتِهَا