Abu Umamah reported: The Prophet, peace and blessings be upon him, said, “Whenever a Muslim man emancipates a Muslim man, he will be his freedom from Hellfire; he will be rewarded for every limb of his in equal measure. Whenever a Muslim man emancipates two Muslim women, they will be his freedom from Hellfire; he will be rewarded for every limb of theirs in equal measure. Whenever a Muslim woman emancipates a Muslim woman, she will be her freedom from Hellfire; she will be rewarded for every limb of hers in equal measure.”
Source: Sunan al-Tirmidhī 1547
Grade: Sahih (authentic) according to Al-Albani
Al-Marghinani said, “For this reason it is preferred for men to free men and women to free women, so as to fulfill equivalency in limb for limb.”
Source: al-‘Ināyah fī Sharḥ al-Hidāyah 4/429
عَنْ أَبِي أُمَامَةَ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ أَيُّمَا امْرِئٍ مُسْلِمٍ أَعْتَقَ امْرَأً مُسْلِمًا كَانَ فَكَاكَهُ مِنْ النَّارِ يُجْزِي كُلُّ عُضْوٍ مِنْهُ عُضْوًا مِنْهُ وَأَيُّمَا امْرِئٍ مُسْلِمٍ أَعْتَقَ امْرَأَتَيْنِ مُسْلِمَتَيْنِ كَانَتَا فَكَاكَهُ مِنْ النَّارِ يُجْزِي كُلُّ عُضْوٍ مِنْهُمَا عُضْوًا مِنْهُ وَأَيُّمَا امْرَأَةٍ مُسْلِمَةٍ أَعْتَقَتْ امْرَأَةً مُسْلِمَةً كَانَتْ فَكَاكَهَا مِنْ النَّارِ يُجْزِي كُلُّ عُضْوٍ مِنْهَا عُضْوًا مِنْهَا
1547 سنن الترمذي كتاب النذور والأيمان باب ما جاء في فضل من أعتق
1547 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الترمذي
قال المرغيناني وَلِهَذَا اسْتَحَبُّوا أَنْ يُعْتِقَ الرَّجُلُ الْعَبْدَ وَالْمَرْأَةُ الْأَمَةَ لِيَتَحَقَّقَ مُقَابَلَةُ الْأَعْضَاءِ بِالْأَعْضَاءِ
4/429 العناية شرح الهداية