Hadith 3459
´It was narrated that Kathir bin As-Sa'ib said:` "The sons of Quraizah told me that they were presented to the Messenger of Allah on the Day of Quraizah, and whoever (among them) had reached puberty, or had grown pubic hair, was killed, and whoever had not reached puberty and had not grown pubic hair was left (alive)."
Hadith 4984
´It was narrated that 'Atiyyah said:` 'I was among the prisoners of Quraizah; we were examined, and whoever had grown (pubic) hair was killed, and whoever had not grown hair, he was allowed to live and was not killed."