Sunan an-Nasa'i, Book 27, Hadith 39 (In-Book) ⓘ
It was narrated from 'Umar bin Mu'attib that Abu Hasan, the freed slave of Banu Nawfal, said: "My wife and I were slaves, and I divorced her twice, then we were both set free. I asked Ibn 'Abbas and he said: 'If you take her back, you have two divorces left. This is how the Messenger of Allah ruled.'"
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ سَمِعْتُ يَحْيَى، قَالَ حَدَّثَنَا عَلِيُّ بْنُ الْمُبَارَكِ، قَالَ حَدَّثَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ، عَنْ عُمَرَ بْنِ مُعَتِّبٍ، أَنَّ أَبَا حَسَنٍ، مَوْلَى بَنِي نَوْفَلٍ أَخْبَرَهُ قَالَ كُنْتُ أَنَا وَامْرَأَتِي، مَمْلُوكَيْنِ فَطَلَّقْتُهَا تَطْلِيقَتَيْنِ ثُمَّ أُعْتِقْنَا جَمِيعًا فَسَأَلْتُ ابْنَ عَبَّاسٍ فَقَالَ إِنْ رَاجَعْتَهَا كَانَتْ عِنْدَكَ عَلَى وَاحِدَةٍ قَضَى بِذَلِكَ رَسُولُ اللَّهِ صلى الله عليه وسلم . خَالَفَهُ مَعْمَرٌ .
also referenced under: Hadith 3427 (Reference) & Volume 4, Book 27, Hadith 3457 (DarusSalam)