Ata' bin Abi Rabah عطاء بن أبي رباح · The Book on Military Expeditions

"We were presented to the Messenger of Allah (ﷺ) on the day of (the battle of) Quraizah. Whoever had pubic hair was killed and whoever did not was left to his way. I was of those who did not have pubic hair so I was left to my way." This Hadith is Hasan Sahih. This is acted upon according to some of the people of knowledge. They consider pubic hair an indication of the age of responsibility, if it is…

From his father, from his grandfather, that the Messenger of Allah (ﷺ) said during his Khutbah: "Fulfill the allegiances sworn in Jahiliyyah for it" - meaning Islam - "does not add to them except in gravity. And do not initiate new allegiances in Islam." There are narration on this topic from 'Abdur-Rahman bin 'Awf, Umm Salamah, Jubair bin Mut'im, Abu Hurairah, Ibn 'Abbas, and Qais bin 'Asim. This Hadith is Hasan Sahih.

"We did not pledge to the Messenger of Allah (ﷺ) for death, but only that we would not flee." This Hadith is Hasan Sahih, meaning both of the Ahadith are Sahih. Some of his Companions pledged to him for death, they said only: "We will not leave from in front of you as long as we are not killed." While others pledged him by saying: "We will not flee."