Saʿd ibn Abī Waqqās (Arabic: سعد بن أبي وقاص) was of the companions of the Islamic prophet. Sa’d was the third or fourth person to embrace Islam at the age of seventeen. He is mainly known for his commandership in The Battle of Qadisiyyah and in the conquest of Persia in 636, governorship over it, and diplomatic sojourns to China in 651.
He fought at the battle of Badr with his young brother ʿUmayr. Being only in his early teens, Umayr was denied access to battle, but after struggling and crying, he was later given permission by Muhammed to fight in battle. Saʿd returned to Medina alone; ʿUmayr was one of the fourteen Muslims who died in the battle.
At the battle of Uhud, Saʿd was chosen as an archer together with Zayd, Saʿīb (the son of Uthmān ibn Mazūn) and others. Saʿd was among those who fought in defense of Muhammad after some Muslims had deserted their positions.
He fell ill during the Farewell Pilgrimage, and he had only a daughter during this period.
Sa` ad Ibn Abi Waqqas, was the one who built the city of Kufa in Iraq during the reign Umar ibn al-Khattab.
Saʿd also fought under ʿUmar’s command against the Sassanid army at the Battle of al-Qādisiyyah and Battle of Nahāvand. He was later appointed the governor of Kufa and Nejd during the caliphate of ʿUmar.
He was one of six people nominated by Umar ibn al-Khattab for the third caliphate.
Uthman carried out ʿUmar’s recommendation and appointed Saʿd as governor of Kufa.
He outlived all ten blessed companions, and died a wealthy man at the age of eighty, around the year 674. Sa’d is among the ten promised of paradise.
Source: https://en.wikipedia.org/wiki/Sa%60d_ibn_Abi_Waqqas