The Prophet Muhammad prophesized the conquest of Persia.[7] It was conquered by Umar’s commander, Sa’ad bin Abi Waqqas. In the words of Encyclopedia Britannica:
“…raids into Sasanian territory were quickly taken up by Muhammad’s Caliphs, or deputies, at Medina - Abu Bakr and Umar ibn al-Khattab… an Arab victory at Al-Qadisiyyah in 636/637 was followed by the sack of the Sasanian winter capital at Ctesiphon on the Tigris. The Battle of Nahavand in 642 completed the Sasanids’ vanquishment.”