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nasai-kubra:5476 – Hannād b. al-Sarī > Abū Zubayd ʿAbthar b. al-Qāsim > Muṭarrif > ʿĀmir > Abū Burdah > Abū Mūsá

"The Messenger of Allah said: 'Whoever manumits his female slave, then marries her, he will have two rewards.'" (Using translation from Nasāʾī 3345)  

الكبرى للنسائي:٥٤٧٦ – أَخْبَرَنَا هَنَّادُ بْنُ السَّرِيِّ عَنْ أَبِي زُبَيْدٍ عَبْثَرِ بْنِ الْقَاسِمِ عَنْ مُطَرِّفٍ عَنْ عَامِرٍ عَنْ أَبِي بُرْدَةَ عَنْ أَبِي مُوسَى قَالَ

قَالَ رَسُولُ اللهِ ﷺ «مَنْ أَعْتَقَ جَارِيَتَهُ ثُمَّ تَزَوَّجَهَا فَلَهُ أَجْرَانِ»  

See similar narrations below:

Collected by Muslim, Nasāʾī, Abū Dāwūd
muslim:154b – Yaḥyá b. Yaḥyá > Khālid b. ʿAbdullāh > Muṭarrif > ʿĀmir > Abū Burdah > Abū Mūsá

Abu Musa reported that Messenger of Allah ﷺ said about one who emancipated a slave woman, and then married her, that for him there are two rewards.  

مسلم:١٥٤b – وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى أَخْبَرَنَا خَالِدُ بْنُ عَبْدِ اللَّهِ عَنْ مُطَرِّفٍ عَنْ عَامِرٍ عَنْ أَبِي بُرْدَةَ عَنْ أَبِي مُوسَى قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ فِي الَّذِي يُعْتِقُ جَارِيَتَهُ ثُمَّ يَتَزَوَّجُهَا لَهُ أَجْرَانِ  

nasai:3345 – Hannād b. al-Sarī > Abū Zubayd ʿAbthar b. al-Qāsim > Muṭarrif > ʿĀmir > Abū Burdah > Abū Mūsá

"The Messenger of Allah said: 'Whoever manumits his female slave, then marries her, he will have two rewards.'"  

النسائي:٣٣٤٥ – أَخْبَرَنَا هَنَّادُ بْنُ السَّرِيِّ عَنْ أَبِي زُبَيْدٍ عَبْثَرِ بْنِ الْقَاسِمِ عَنْ مُطَرِّفٍ عَنْ عَامِرٍ عَنْ أَبِي بُرْدَةَ عَنْ أَبِي مُوسَى قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ أَعْتَقَ جَارِيَتَهُ ثُمَّ تَزَوَّجَهَا فَلَهُ أَجْرَانِ  

abudawud:2053 – Hannād b. al-Sarī > ʿAbthar > Muṭarrif > ʿĀmir > Abū Burdah > Abū Mūsá

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.”  

أبو داود:٢٠٥٣ – حَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ حَدَّثَنَا عَبْثَرٌ عَنْ مُطَرِّفٍ عَنْ عَامِرٍ عَنْ أَبِي بُرْدَةَ عَنْ أَبِي مُوسَى قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ أَعْتَقَ جَارِيَتَهُ وَتَزَوَّجَهَا كَانَ لَهُ أَجْرَانِ