Sayyiduna Atiyyah al-Qurazi (may Allah be pleased with him) said: I was among those about whom Sayyiduna Sa'd bin Mu'adh (may Allah be pleased with him) gave judgment. the Messenger of Allah (peace and blessings be upon him) ordered that the fighters be killed, and the children were taken captive. The people brought me, and they were about to kill me too. They uncovered my private area and saw that my pubic hair had not grown (I had not reached puberty), so they placed me among the captives.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18020