Ibn Isḥāq said: Ṣāliḥ ibn Kaysān related to me, from Saʿd ibn Mālik, who said:
“Before the Hijrah we would taste the meagerness and hardship of life and could hardly bear it. Yet once we migrated, hunger and severe deprivation descended upon us—but we became accustomed to them and grew strong enough to endure.
As for Muṣʿab ibn ʿUmayr, he had been the most pampered youth in Mecca, living in luxury with his parents among us. When the same trials befell him he could not withstand them. I saw his skin flaking off him like a snake shedding its skin. More than once I saw him collapse, unable to walk, so we would line up our bows for him and then carry him on our shoulders.
On one occasion I rose in the night to relieve myself and heard something beneath my urine move away. I felt with my hand and found a piece of camel hide. I took it, washed it thoroughly, roasted it over the fire, pounded it, then tore it into three strips and lived off it for three days. (1)
Ibn Isḥāq added: Muṣʿab ibn ʿUmayr fought in front of the Messenger of Allah ﷺ until he was killed. He was slain by Ibn Qamīʾah al-Laythī, who thought he had struck down the Messenger of Allah. He returned to Quraysh saying, “I have killed Muḥammad.”
When Muṣʿab was killed, the Messenger of Allah ﷺ entrusted the standard to ʿAlī ibn Abī Ṭālib and to other men from among the Muslims. (2)