When after the defeat of Taleaha, many of his followers sought refuge with Umm Zummal, she decided to avail of the opportunity, and lead a coalition against the Muslims. She moved from tribe to tribe and exerted them to hostility against the Muslims. She mustered a considerable force which assembled at her headquarter Zafar at the western edge of the Salma range, a rugged mountain named after her When Khalid came to know of the hostile intentions of Umm Zummal, he led a Muslim force from Buzakha to Zafar. Immediately on arrival at Zafar, Khalid took the initiative and launched the attack. Umm Zummal and her forces offered stiff resistance, it was by all accounts a hard battle. Mounted on a camel, Umm Zummal personally led the charge, and her undaunted courage was a source of great inspiration for her followers. Failure of his first effort to dislodge the apostates made Khalid reassess the situation. He saw that the center of the apostates was led by Umm Zummal who rode on a magnificent camel which belonged to her mother. She exhorted her followers to fight bravely. She was surrounded by a ring of warriors who fought desperately, fired with a determination to win or die. For long the result of the confrontation remained uncertain. Khalid realized that the moral strength of the apostate force lay in the leadership of Umm Zummal, and unless she was eliminated somehow the chances of the Muslim victory were not very bright. Khalid directed his archers to aim at the camel on which Umm Zummal was riding. Every bow was bent and every spear of the Muslim was directed towards the camel. The camel was pierced with countless wounds, and it fell. Then Khalid with a picked group of warriors made a determined thrust towards the center, and as the litter carrying Salma alias Umm Zummal fell to the ground she was killed immediately. The Muslims made free use of their swords and spears. Umm Zummal lay dead on the battlefield, and around her lay the dead bodies of her bodyguards who had fought to the last in her defense. With the death of Umm Zummal all resistance of the apostates collapsed and the battle of Zafar was won by the Muslims. That was in October 632 C. E. The apostate bibles offered submission and were re-admitted to the fold of Islam. Considerable booty fell into the hands of the Muslims which was sent to Madina.