Shortly after, in October/November of the same year, Sahib ibn Abbad, the "vizier" of Adud al-Dawla's younger brother Mu'ayyad al-Dawla, arrived from Ray to negotiate a transfer of power in the city in favor of his master. Adud al-Dawla recognized his younger brother Mu'ayyad because of his loyalty, and gave him the troops of Fakhr al-Dawla and helped him conquer Tabaristan and Gorgan from Qabus, who had betrayed Adud al-Dawla by giving refuge to Fakhr al-Dawla. Mu'ayyad al-Dawla shortly managed to conquer these two provinces.