Sunan Abi Dawud 2053
سنن أبي داود#2053Sahihحَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ، حَدَّثَنَا عَبْثَرٌ، عَنْ مُطَرِّفٍ، عَنْ عَامِرٍ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ أَعْتَقَ جَارِيَتَهُ وَتَزَوَّجَهَا كَانَ لَهُ أَجْرَانِ " .
Abu Dawud reported the Apostle of Allaah(ﷺ) as saying “Anyone who sets his slave girl free and then marries her, will have a double reward.”
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:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (2544) Sahih Muslim (154 After 1427)
In-book reference: 12:8