بُلُوغُ الْمَرَامِ
Bulugh al-Maram 1009
Marriage
وَعَنِ ابْنِ عَبَّاسٍ - رَضِيَ اَللَّهُ عَنْهُمَا- قَالَ : { رَدَّ اَلنَّبِيُّ - صلى الله عليه وسلم -اِبْنَتَهُ زَيْنَبَ عَلَى أَبِي الْعَاصِ بْنِ اَلرَّبِيعِ , بَعْدَ سِتِّ سِنِينَ بِالنِّكَاحِ اَلْأَوَّلِ , وَلَمْ يُحْدِثْ نِكَاحًا } رَوَاهُ أَحْمَدُ , وَالْأَرْبَعَةُ [1] إِلَّا النَّسَائِيَّ , وَصَحَّحَهُ أَحْمَدُ , وَالْحَاكِمُ [2] .
Narrated Ibn 'Abbas (RA): The Prophet (ﷺ) returned his daughter Zainab (RA) to [her husband] Abul-'Aas bin ar-Rabi' (RA) based upon the first marriage, after six years (of separation), and he did not perform a new marriage. [Reported by Ahmad and al-Arba'a except an-Nasa'i. Ahmad and al-Hakim graded it Sahih (authentic)].
Sunnah.com reference: Book 8, Hadith 49