Sahih Muslim Book - 27, Hadith - 4302

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ وَمُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ - وَاللَّفْظُ لأَبِى 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 رَأَيْتُنِى سَابِعَ سَبْعَةٍ مِنْ بَنِى مُقَرِّنٍ مَا لَنَا خَادِمٌ إِلاَّ وَاحِدَةٌ لَطَمَهَا أَصْغَرُنَا فَأَمَرَنَا رَسُولُ اللَّهِ -صلى الله عليه وسلم- أَنْ نُعْتِقَهَا.

It was narrated that Hilal bin Yasaf said: "An old man got angry and slapped a servant of his. Suwaid bin Muqarrin said to him: 'Could you not find any part other than her face? I remember when I was the seventh of seven sons of Banu Muqarrin and we had no servant but one woman. The youngest of us slapped her and the Messenger of Allah (s.a.w) commanded us to manumit her."'