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 Messenger of Allah ﷺ commanded us to set her free. 2097  

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 ﷺ أَنْ نُعْتِقَهَا  

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 Messenger of Allah ﷺ, and we had but only one servant. One of us got enraged and slapped him. Thereupon Messenger of Allah ﷺ commanded us to set him free.  

لَقَدْ رَأَيْتُنِي وَإِنِّي لَسَابِعُ إِخْوَةٍ لِي مَعَ رَسُولِ اللَّهِ ﷺ وَمَا لَنَا خَادِمٌ غَيْرُ وَاحِدٍ فَعَمَدَ أَحَدُنَا فَلَطَمَهُ فَأَمَرَنَا رَسُولُ اللَّهِ ﷺ أَنْ نُعْتِقَهُ  

"We were seven brothers without a servant except one, and one of us slapped her, so the Prophet ﷺ ordered us to free her."  

لَقَدْ رَأَيْتُنَا سَبْعَةَ إِخْوَةٍ مَا لَنَا خَادِمٌ إِلاَّ وَاحِدَةٌ فَلَطَمَهَا أَحَدُنَا فَأَمَرَنَا النَّبِيُّ ﷺ أَنْ نُعْتِقَهَا قَالَ وَفِي الْبَابِ عَنِ ابْنِ عُمَرَ  

[Machine] Did his face get slapped by Suwayd bin Muqarrin? I saw myself as the seventh of seven and we only have one servant, so one of us slapped her. So the Messenger of Allah, ﷺ , ordered that she be freed. This is the wording of the Hadith of Adam.  

لَهُ سُوَيْدُ بْنُ مُقَرِّنٍ ؓ لَطَمْتَ وَجْهَهَا؟ لَقَدْ رَأَيْتُنِي سَابِعَ سَبْعَةٍ وَمَا لَنَا إِلَّا خَادِمٌ فَلَطَمَهَا بَعْضُنَا فَأَمَرَهُ رَسُولُ اللهِ ﷺ أَنْ يُعْتِقُهَا لَفْظُ حَدِيثِ آدَمَ