On his father's authority, said that his grandfather reported the Prophet ﷺ said: When one of you marries his male-slave to his slave-woman, he should not look at her private parts.
عَنِ النَّبِيِّ ﷺ قَالَ إِذَا زَوَّجَ أَحَدُكُمْ عَبْدَهُ أَمَتَهُ فَلاَ يَنْظُرْ إِلَى عَوْرَتِهَا
On his father's authority, said that his grandfather reported the Prophet ﷺ said: When one of you marries his female servant to his slave or to his employee, he should not look at her private part below the navel and above the knees. Abu Dawud said: The correct name is Sawwad b. Dawud al-Muzani al-Sairafi (and not Dawud b. Sawwad as mentioned in the chain). The narrator waki' misunderstood it.
عَنِ النَّبِيِّ ﷺ قَالَ إِذَا زَوَّجَ أَحَدُكُمْ خَادِمَهُ عَبْدَهُ أَوْ أَجِيرَهُ فَلاَ يَنْظُرْ إِلَى مَا دُونَ السُّرَّةِ وَفَوْقَ الرُّكْبَةِ
[Machine] "That the Prophet ﷺ said: 'When one of you marries his slave girl or hired worker, he should not look at her private parts.' This is what my father said about her private parts."
أَنَّ النَّبِيَّ ﷺ قَالَ إِذَا زَوَّجَ أَحَدُكُمْ عَبْدَهُ أَمَتَهُ أَوْ أَجِيرَهُ فَلَا يَنْظُرَنَّ إِلَى عَوْرَتِهَا كَذَا قَالَ أَبِي عَوْرَتِهَا