Full Sharh — Sahih Muslim 4302
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَمُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، - وَاللَّفْظُ لأَبِي بَكْرٍ - قَالاَ حَدَّثَنَا ابْنُ إِدْرِيسَ، عَنْ حُصَيْنٍ، عَنْ هِلاَلِ بْنِ يَسَافٍ، قَالَ عَجِلَ شَيْخٌ فَلَطَمَ خَادِمًا لَهُ فَقَالَ لَهُ سُوَيْدُ بْنُ مُقَرِّنٍ عَجَزَ عَلَيْكَ إِلاَّ حُرُّ وَجْهِهَا لَقَدْ رَأَيْتُنِي سَابِعَ سَبْعَةٍ مِنْ بَنِي مُقَرِّنٍ مَا لَنَا خَادِمٌ إِلاَّ وَاحِدَةٌ لَطَمَهَا أَصْغَرُنَا فَأَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ نُعْتِقَهَا .
English Translation
Hilal b. Yasaf reported that a person got angry and slapped his slave-girl. Thereupon Suwaid b. Muqarrin said to him:You could find no other part (to slap) but the prominent part of her face. See I was one of the seven sons of Muqarrin, and we had but only one slave-girl. The youngest of us slapped her, and Allah's Messenger (ﷺ) commanded us to set her free
Source
Sahih Muslim(صحيح مسلم)
The Book of Oaths
Hadith Number
4302