Abu Dawud Book 1, Hadith Number 209.
Chapter : On prostatic fluid madhi.
Narated By N/A : ‘Urwah reported on the authority of his father a tradition from ‘All b. 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.”