(92) بَابُ لِيَجْتَنِبِ الْوَجْهَ فِي الضَّرْبِ
Abu Hurayra reported that the Prophet, may Allah bless him andgrant him peace, said, "When one of you strikes his servant, let him avoidhis face."
Reference: Al-Adab Al-Mufrad 174
In-book reference: Book 9, Hadith 19
English translation: Book 9, Hadith 174