Kathir bin al-Sa'ib (may Allah have mercy on him) said that the people of Qurayzah say that they were presented before the Messenger of Allah (peace and blessings be upon him) at the time of Qurayzah; whoever had reached puberty or had grown hair, they would kill him, otherwise not.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحجر / 11319