Marrying Those Whom One's Father Married

It was narrated that Al-Bara' said:

"I met my maternal uncle who was carrying a flag (for an expedition) and I said: 'Where are you going?' He said: 'The Messenger of Allah is sending me to a man who has married his father's wife after he died, to strike his neck or kill him.'"

أَخْبَرَنَا أَحْمَدُ بْنُ عُثْمَانَ بْنِ حَكِيمٍ، قَالَ حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا الْحَسَنُ بْنُ صَالِحٍ، عَنِ السُّدِّيِّ، عَنْ عَدِيِّ بْنِ ثَابِتٍ، عَنِ الْبَرَاءِ، قَالَ لَقِيتُ خَالِي وَمَعَهُ الرَّايَةُ فَقُلْتُ أَيْنَ تُرِيدُ قَالَ أَرْسَلَنِي رَسُولُ اللَّهِ صلى الله عليه وسلم إِلَى رَجُلٍ تَزَوَّجَ امْرَأَةَ أَبِيهِ مِنْ بَعْدِهِ أَنْ أَضْرِبَ عُنُقَهُ أَوْ أَقْتُلَهُ ‏.‏

It was narrated from Yazid bin Al-Bara' that his father said:

"I met my maternal uncle who was carrying a flag (for an expedition) and I said: 'Where are you going?' He said: 'The Messenger of Allah is sending me to a man who has married his father's wife, and he has commanded me to strike his neck (kill him) and seize his wealth.'"

أَخْبَرَنَا عَمْرُو بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عَمْرٍو، عَنْ زَيْدٍ، عَنْ عَدِيِّ بْنِ ثَابِتٍ، عَنْ يَزِيدَ بْنِ الْبَرَاءِ، عَنْ أَبِيهِ، قَالَ أَصَبْتُ عَمِّي وَمَعَهُ رَايَةٌ فَقُلْتُ أَيْنَ تُرِيدُ فَقَالَ بَعَثَنِي رَسُولُ اللَّهِ صلى الله عليه وسلم إِلَى رَجُلٍ نَكَحَ امْرَأَةَ أَبِيهِ فَأَمَرَنِي أَنْ أَضْرِبَ عُنُقَهُ وَآخُذَ مَالَهُ ‏.‏