Atiyah al-Qurazi narrated: I was among the captives (8) of Qurayza. They would examine us; whoever had grown hair was killed, and whoever had not grown it was not killed. I was among those who had not grown it. This was reported by al-Athram and al-Tirmidhi (9), who said: This is a hasan sahih (good and authentic) hadith. It is narrated from Kathir ibn al-Sa'ib, who said: The sons of Qurayza told me that they were presented to the Prophet (peace and blessings of Allah be upon him), and whoever among them had reached puberty or had grown pubic hair was killed, and whoever had not was left. This was reported by al-Athram (10). From Aslam, the freed slave of Umar, it is narrated that Umar used to write to the commanders of the armies not to kill anyone except those upon whom razors have passed (i.e., those who have grown pubic hair), and not to take the jizya except from those upon whom razors have passed (11). It is narrated from al-Shafi'i that this [growth of hair] is puberty in the case of disbelievers because it is not possible to rely on their word regarding nocturnal emission or the number of years, and it is not a sign of it (12) among (13) the Muslims, as that is possible for them (14). Our evidence is the statement of Abu Nadra and Uqba ibn Amir when there was a disagreement regarding the puberty of Tamim ibn Fira' al-Mahri: "Look; if he has grown hair, then divide [the spoils] for him." Some of the people looked at him and found that he had indeed grown hair, so they divided (15) for him (16). This disagreement did not persist, so it became an consensus (ijma'). It is a sign of puberty in the case of a disbeliever, so it is a sign of it in the case of a Muslim, like the other two signs. It is also a matter that usually accompanies puberty, so it is a sign of it, like nocturnal emission. As for their argument that it is impossible to know the nocturnal emission or age of a disbeliever, we say: It is not impossible to know the age of a dhimmi who grows up among the Muslims. Furthermore, the difficulty of obtaining knowledge does not necessitate making what is not a sign into a sign, as is the case with things other than hair growth. The third [sign] is reaching fifteen years of age, based on what Ibn Umar narrated, saying: I was presented to the Prophet (peace and blessings of Allah be upon him) while I was fourteen years old, and he did not enlist me