Sunan Abi Dawud 2075
سنن أبي داود#2075Hasanحَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ فَارِسٍ، حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا أَبِي، عَنِ ابْنِ إِسْحَاقَ، حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ هُرْمُزَ الأَعْرَجُ، أَنَّ الْعَبَّاسَ بْنَ عَبْدِ اللَّهِ بْنِ الْعَبَّاسِ، أَنْكَحَ عَبْدَ الرَّحْمَنِ بْنَ الْحَكَمِ ابْنَتَهُ وَأَنْكَحَهُ عَبْدُ الرَّحْمَنِ ابْنَتَهُ وَكَانَا جَعَلاَ صَدَاقًا فَكَتَبَ مُعَاوِيَةُ إِلَى مَرْوَانَ يَأْمُرُهُ بِالتَّفْرِيقِ بَيْنَهُمَا وَقَالَ فِي كِتَابِهِ هَذَا الشِّغَارُ الَّذِي نَهَى عَنْهُ رَسُولُ اللَّهِ صلى الله عليه وسلم .
Abdur Rahman ibn Hurmuz al-A'raj said:Al-Abbas ibn Abdullah ibn al-Abbas married his daughter to Abdur Rahman ibn al-Hakam, and AbdurRahman married his daughter to him. And they made this (exchange) their dower. Mu'awiyah wrote to Marwan commanding him to separate them. He wrote in his letter: This is the shighar which the Messenger of Allah (ﷺ) has forbidden
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 12:30