Sahih Muslim 1408gBook 16, Hadith 45
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ هِشَامٍ، عَنْ مُحَمَّدِ بْنِ سِيرِينَ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ يَخْطُبُ الرَّجُلُ عَلَى خِطْبَةِ أَخِيهِ وَلاَ يَسُومُ عَلَى سَوْمِ أَخِيهِ وَلاَ تُنْكَحُ الْمَرْأَةُ عَلَى عَمَّتِهَا وَلاَ عَلَى خَالَتِهَا وَلاَ تَسْأَلُ الْمَرْأَةُ طَلاَقَ أُخْتِهَا لِتَكْتَفِئَ صَحْفَتَهَا وَلْتَنْكِحْ فَإِنَّمَا لَهَا مَا كَتَبَ اللَّهُ لَهَا " .
A man must not make proposal of marriage to a woman when his brother has done so already. And he must not offer a price for a thing for which his brother had already offered a price; and a woman must not be combined in marriage with her father's sister, nor with her mother's sister, and a woman must not ask to have her sister divorced in order to deprive her of what belongs to her, but she must marry, because she will have what Allah has decreed for her.