Sahih Muslim #4304 · The Book of Oaths

Sahih MuslimSuwaid b. Muqarrin reported that he had a slave-girl and a person
Sahih Muslim · Book 27 · The Book of Oaths
Sahih Muslim · كتاب 27 · كتاب الأيمان
Don't you know that it is forbidden (to strike the) face. He said: You see I was the seventh one amongst my brothers during the lifetime of Allah's Messenger (ﷺ), and we had but only one servant. One of us got enraged and slapped him. Thereupon Allah's Messenger (ﷺ) commanded us to set him free.
وَحَدَّثَنَا عَبْدُ الْوَارِثِ بْنُ عَبْدِ الصَّمَدِ، حَدَّثَنِي أَبِي، حَدَّثَنَا شُعْبَةُ، قَالَ قَالَ لِي مُحَمَّدُ بْنُ الْمُنْكَدِرِ مَا اسْمُكَ قُلْتُ شُعْبَةُ ‏.‏ فَقَالَ مُحَمَّدٌ حَدَّثَنِي أَبُو شُعْبَةَ الْعِرَاقِيُّ عَنْ سُوَيْدِ بْنِ مُقَرِّنٍ أَنَّ جَارِيَةً لَهُ لَطَمَهَا إِنْسَانٌ فَقَالَ لَهُ سُوَيْدٌ أَمَا عَلِمْتَ أَنَّ الصُّورَةَ مُحَرَّمَةٌ فَقَالَ لَقَدْ رَأَيْتُنِي وَإِنِّي لَسَابِعُ إِخْوَةٍ لِي مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم وَمَا لَنَا خَادِمٌ غَيْرُ وَاحِدٍ فَعَمَدَ أَحَدُنَا فَلَطَمَهُ فَأَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ نُعْتِقَهُ ‏.‏
Reference : Sahih Muslim 4304In-book reference : Book 27, Hadith 51