‘Amr b. Shu'aib, on his father’s authority, told that his grandfather reported the Prophet as saying, “When one of you marries his slave to his slave girl he must not look at her private parts.” A version has, “he must not look at what is below the navel and above the knee.” Abu Dawud transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب النكاح / 3111
Hadith Gradingالألبانی:حسن | زبیر علی زئی:إسناده حسن
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده حسن، رواه أبو داود (4114)»