Sunan Ibn Majah Book 20, Hadith 2541

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ عَبْدِ الْمَلِكِ بْنِ عُمَيْرٍ، قَالَ سَمِعْتُ عَطِيَّةَ الْقُرَظِيَّ، يَقُولُ عُرِضْنَا عَلَى رَسُولِ اللَّهِ صلى الله عليه وسلم يَوْمَ قُرَيْظَةَ فَكَانَ مَنْ أَنْبَتَ قُتِلَ وَمَنْ لَمْ يُنْبِتْ خُلِّيَ سَبِيلُهُ فَكُنْتُ فِيمَنْ لَمْ يُنْبِتْ فَخُلِّيَ سَبِيلِي ‏.‏

It was narrated that 'Abdul-Malik bin `Umair said:“I heard 'Atiyyah Al-Quradhi say: 'We were presented to the Messenger of Allah (ﷺ) on the Day of Quraidhah. Those whose pubic hair had grown were killed, and those whose pubic hair had not yet grown were let go. I was one of those whose pubic hair had not yet grown, so I was let go.”