Sahih Bukhari Volume 6, Book 65, Hadith 4581

حَدَّثَنَا مُحَمَّدُ بْنُ مُقَاتِلٍ، حَدَّثَنَا أَسْبَاطُ بْنُ مُحَمَّدٍ، حَدَّثَنَا الشَّيْبَانِيُّ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ،‏.‏ قَالَ الشَّيْبَانِيُّ وَذَكَرَهُ أَبُو الْحَسَنِ السُّوَائِيُّ وَلاَ أَظُنُّهُ ذَكَرَهُ إِلاَّ عَنِ ابْنِ عَبَّاسٍ، ‏{‏يَا أَيُّهَا الَّذِينَ آمَنُوا لاَ يَحِلُّ لَكُمْ أَنْ تَرِثُوا النِّسَاءَ كَرْهًا وَلاَ تَعْضُلُوهُنَّ لِتَذْهَبُوا بِبَعْضِ مَا آتَيْتُمُوهُنَّ‏}‏ قَالَ كَانُوا إِذَا مَاتَ الرَّجُلُ كَانَ أَوْلِيَاؤُهُ أَحَقَّ بِامْرَأَتِهِ، إِنْ شَاءَ بَعْضُهُمْ تَزَوَّجَهَا، وَإِنْ شَاءُوا زَوَّجُوهَا، وَإِنْ شَاءُوا لَمْ يُزَوِّجُوهَا، فَهُمْ أَحَقُّ بِهَا مِنْ أَهْلِهَا، فَنَزَلَتْ هَذِهِ الآيَةُ فِي ذَلِكَ‏.‏

Narrated By Ibn Abbas : Regarding the Divine Verse: "O you who believe! You are forbidden to inherit women against their will, and you should not treat them with harshness that you may take back part of the (Mahr) dower you have given them." (4.19) (Before this revelation) if a man died, his relatives used to have the right to inherit his wife, and one of them could marry her if he would, or they would give her in marriage if they wished, or, if they wished, they would not give her in marriage at all, and they would be more entitled to dispose her, than her own relatives. So the above Verse was revealed in this connection.