Sanjar Shah ruled until his murder by his son Ghazi in 1208 and was succeeded by his son Mu'izz al-Din Mahmud. Mahmud successfully maintained Zengid control over Jazirat Ibn ʿUmar with the marriage of his son al-Malik al-Mas'ud Shahanshah to the daughter of Badr al-Din Lu'lu', who had overthrown the Zengids at Mosul and usurped power for himself in 1233. The Grand Mosque of Jazirat Ibn ʿUmar was renovated during Mahmud's reign. In the early 13th century, the city's fort and madrasa are attested by Ibn al-Athir in "Al-Tārīkh al-bāhir fī al-Dawlah al-Atābakīyah bi-al-Mawṣil", and its mosque by Ibn Khallikan in "Wafayāt al-Aʿyān". According to the Arab scholar Izz al-Din ibn Shaddad, the Mongol Empire demanded 100,000 dinars in tribute from the ruler of Jazirat Ibn ʿUmar in 1251. The end of the Zengid dynasty was heralded by the death of Mahmud in 1251 as Badr al-Din Lu'lu' had Mahmud's successor al-Malik al-Mas'ud Shahanshah killed soon after and assumed control of Jazirat Ibn ʿUmar.