Hashemite–Umayyad rivalry demoralized, and ended in a Muslim victory. From that day onwards, it is said that the rivalry between the two clans developed into a severe case of tribal animosity. Muhammad had ordered that those Hashimites who were fighting in the side of the Meccans at Badr, including his uncle Abbas ibn Abdul-Muttalib were not to be killed. Reacting to this, Abu Hudhayfa ibn 'Utba, a Muslim belonging to Banu Umayya, and a son and brother respectively of the Meccan warriors killed in the duels, remarked: "Shall we kill our fathers, brothers and children, and leave al-Abbas? By Allah! If I
Battle of al-Qādisiyyah and led a group of Mubarizuns, from his Syrian contingent who were also the veterans of Battle of Yarmouk, through the Sassanids' right center towards Rostam's headquarter. Rostam again personally led a counterattack against the Muslims, but no breakthrough could be achieved. At dusk, the two armies pulled back to their camps. On 18 November, Rostam wanted a quick victory, before more Muslim reinforcements could arrive. The Elephant corps was once again in the front of the Sassanid army, giving him the advantage. Pressing this advantage, Rostam ordered a general attack along the Muslim front, using his full force. All