If anyone emancipates a Muslim slave, Allah will set free from Hell an organ of his body for every organ of his (slave's) body.  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَعْتَقَ رَقَبَةً مُؤْمِنَةً أَعْتَقَ اللَّهُ بِكُلِّ إِرْبٍ مِنْهَا إِرْبًا مِنْهُ مِنَ النَّارِ  

He who emancipates a slave, Allah will set free from Hell every limb (of his body) for every limb of his (slave's) body, even his private parts.  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَنْ أَعْتَقَ رَقَبَةً أَعْتَقَ اللَّهُ بِكُلِّ عُضْوٍ مِنْهَا عُضْوًا مِنْ أَعْضَائِهِ مِنَ النَّارِ حَتَّى فَرْجَهُ بِفَرْجِهِ  

I heard Messenger of Allah ﷺ as saying: He who emancipates a believing slave. Allah will set free from Fire his every limb for every limb of his (slave's), even his private parts for his.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنْ أَعْتَقَ رَقَبَةً مُؤْمِنَةً أَعْتَقَ اللَّهُ بِكُلِّ عُضْوٍ مِنْهُ عُضْوًا مِنَ النَّارِ حَتَّى يُعْتِقَ فَرْجَهُ بِفَرْجِهِ  

A Muslim who emancipates a Muslim (slave). Allah will save from Fire every limb of his for every limb (of the slave). Sa'id b. Marjana said: When I heard this hadith from Abu Huraira (Allah be pleased with him), I went away and made a mention of it to 'Ali b. Husain and he at once emancipated the slave for which Ibn ja'far was prepared to pay ten thousand dirhams or one thousand dinars.  

قَالَ رَسُولُ اللَّهِ ﷺ أَيُّمَا امْرِئٍ مُسْلِمٍ أَعْتَقَ امْرَأً مُسْلِمًا اسْتَنْقَذَ اللَّهُ بِكُلِّ عُضْوٍ مِنْهُ عُضْوًا مِنْهُ مِنَ النَّارِ قَالَ فَانْطَلَقْتُ حِينَ سَمِعْتُ الْحَدِيثَ مِنْ أَبِي هُرَيْرَةَ فَذَكَرْتُهُ لِعَلِيِّ بْنِ الْحُسَيْنِ فَأَعْتَقَ عَبْدًا لَهُ قَدْ أَعْطَاهُ بِهِ ابْنُ جَعْفَرٍ عَشْرَةَ آلاَفِ دِرْهَمٍ أَوْ أَلْفَ دِينَارٍ