Hatim's son Adi, and another Tayy chieftain, Zayd al-Khayr, converted to Islam together with much of their tribe in 629–630, and became companions of the Islamic "Nabi" (Prophet) Muhammad. The Tayy participated in numerous Muslim military campaigns after Muhammad's death, including in the Ridda Wars and the Muslim conquest of Persia. Al-Jadila in northern Syria remained Christian until the Muslim conquest of their region in 638. The Tayy were split during the First Fitna, with those based in Arabia and Iraq supporting Ali as caliph, and those in Syria supporting Mu'awiyah. The latter and his Umayyad kinsmen ultimately triumphed and members of the Tayy participated in the Umayyad conquest of Sindh in the early 8th century. Nonetheless, a branch of the Tayy under Qahtaba ibn Shabib were among the leaders of the Abbasid Revolution which toppled the Umayyads in the mid-8th century. The Tayy fared well under the Abbasids, producing military officials and renowned poets, such as Buhturi and Abu Tammam.