Sunan Abu Dawud
4405
Sahih+3

The tradition mentioned above has also been transmitted by ‘Abd al- Malik b. ‘Umar through a different chain of narrators. This version has:They uncovered my private parts, and when they found that the hair had not begun to grow they put me among the captives

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid