Muhammad bin Umar said: Sa'd bin Ubayd bin al-Nu'man, who is called "Sa'd al-Qari" and whose kunyah was Abu Zayd, was one of the six people who compiled the Qur'an in the blessed time of the Messenger of Allah (peace and blessings be upon him). He took part in the battles of Badr, Uhud and the Trench, and in all the battles with the Messenger of Allah (peace and blessings be upon him). He was martyred on the day of the Battle of al-Qadisiyyah in the year 16 AH, at the age of 64.