In that same year Qaḥṭabah laid a stringent siege to Nahāvand, until the Syrians inside the city asked him to grant its people a brief respite (1) so that they might open the gate for him. They did open the gate and secured a pledge of safety for themselves. The Khurāsānīs who were present said to them, “What have you done?” They answered, “We have obtained amnesty for ourselves and for you.” Thinking themselves safe, they came out.
Qaḥṭabah then said to the commanders with him, “Whoever has a prisoner from among the Khurāsānīs, let him strike off his head and bring me the head.” They carried this out, and not a single man who had fled from Abū Muslim remained alive. He released the Syrians, honored the guarantee he had given them, and bound them by oath not to aid any enemy against him.
Next Qaḥṭabah, acting on Abū Muslim’s instructions, sent Abū ʿAwn to Shahrāzūr at the head of thirty thousand men. He captured it and killed its deputy, ʿUthmān ibn Sufyān. Some report, however, that ʿUthmān was not killed; rather, he withdrew to Mosul and al-Jazīrah and informed Qaḥṭabah of his whereabouts.
When the caliph Marwān heard of Qaḥṭabah and Abū Muslim and of the turn events had taken, he left Ḥarrān and encamped at a place called al-Zāb al-Akbar.
That same year Qaḥṭabah, with a large force, marched against the governor of Iraq, Yazīd ibn ʿUmar ibn Hubayrah. As he approached, Ibn Hubayrah began to retreat, falling back until he had crossed the Euphrates. Qaḥṭabah came up and crossed after him. What passed between them will be mentioned under the events of the coming year, if Allah Most High wills.
[Then the year 132 AH began.]
In Muḥarram of that year Qaḥṭabah ibn Shabīb crossed the Euphrates with his troops and cavalry, while Ibn Hubayrah was encamped at the mouth of the river facing al-Fallūjah (2) with a vast and formidable host. Marwān had reinforced him heavily, and everyone who had fled from Ibn Ḍubārah’s army had joined him.
Qaḥṭabah then turned aside toward Kūfah in order to seize it, and Ibn Hubayrah followed. On the night of Wednesday, the eighth of Muḥarram, the two armies fought a bitter battle in which heavy casualties were sustained on both sides. The Syrians broke and fled, the Khurāsānīs pursued them, and Qaḥṭabah himself disappeared from sight.
A man informed the troops that Qaḥṭabah had been killed and had directed that command of the army after him go to his son al-Ḥasan, who was present with the forces. They therefore pledged allegiance to Ḥumayd ibn Qaḥṭabah on behalf of his brother al-Ḥasan, and a courier was dispatched to summon al-Ḥasan.
Many commanders fell that night. It is said that Qaḥṭabah was killed by Maʿn ibn Zāʾidah and Yaḥyā ibn Ḥuṣayn; others maintain that one of his own men slew him in vengeance for the two sons of Naṣr ibn Sayyār. Allah knows best. Qaḥṭabah’s body was found among the dead, and he was buried on the spot.