I said to Ka'b bin Murrah, tell us a Hadith from the Messenger of Allah ﷺ, but be careful. He said: I heard the Messenger of Allah ﷺ say: “Whoever frees a Muslim man, he will be his ransom from the Fire; each of his bones will suffice (as a ransom) for each of his bones. Whoever frees two Muslim women, they will be his ransom from the Fire; each of their two bones will suffice (as a ransom) for each of his bones.” (Using translation from Ibn Mājah 2522)
حَدِّثْنَا عَنْ رَسُولِ اللهِ ﷺ وَاحْذَرْ قَالَ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ مَنْ أَعْتَقَ امْرَأً مُسْلِمًا كَانَ فِكَاكَهُ مِنَ النَّارِ يُجْزَى بِكُلِّ عَظْمٍ مِنْهُ عَظْمًا مِنْهُ وَمَنْ أَعْتَقَ امْرَأَتَيْنِ مُسْلِمَتَيْنِ كَانَتَا فِكَاكَهُ مِنَ النَّارِ يُجْزَى بِكُلِّ عَظْمَيْنِ مِنْهُمَا عَظْمًا مِنْهُ وَمَنْ شَابَ شَيْبَةً فِي سَبِيلِ اللهِ كَانَتْ لَهُ نُورًا يَوْمَ الْقِيَامَةِ