He was Sa'd ibn Abi Waqqas's nephew through his father, and was a companion of Muhammad.
Hāshim participated in the Ridda wars to force rebellious Arab tribes to return to Islam after the death of Muhammad.
He played a vital role in the Battle of al-Qādisiyyah that led to the conquest of Al-Mada'in by Muslims.
[1] During the outbreak of the Great apostate rebellions, Hashim participated against the rebellious Arabic tribes following the death of Mohammad in order to return them to Islam.
[2] Shia historian Ibn Musa al-Khwarizmi reported Hashim was sent to Iraq and participated in the Battle of al-Qadisiyyah.