Urwah reported on the Authority of his father a tradition from Ali bin Abi Talib who said: I Asked al-Miqdad (to consult the prophet). He then narrated the tradition bearing the same meaning. Abu Dawud said; this tradition has been reported with another chain of narrators. This version does not mention the word “testicles”.
Hadith Referenceسنن ابي داود / كتاب الطهارة / 209
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:ضعيف, إسناده ضعيف, نسائي (153), السند منقطع،عروة بن الزبير عن علي مرسل،قاله أبو حاتم الرازي (المراسيل ص 149 رقم: 541) ولم يدرك المقداد رضي اللّٰه عنه, وحديث مسلم (303) يغني عنه, انوار الصحيفه، صفحه نمبر 21
Hadith Takhrij«انظر الحديث السابق، ح:208، (تحفة الأشراف: 10241) (صحيح)»
Bahz bin Hakim said that his father told on the authority of his grandfather: I said: Messenger of Allah, from whom should we conceal our private parts and to whom can we show? He replied: conceal your private parts except from your wife and from whom your right hands possess (slave-girls). I then asked: Messenger of Allah, (what should we do), if the people are assembled together? He replied: If it is within your power that no one looks at it, then no one should look at it. I then asked: Messenger of Allah if one of us is alone, (what should he do)? He replied: Allah is more entitled than people that bashfulness should be shown to him.