During his administration of Basra, Sulayman carried out extensive public works projects to develop the region, including building new canals and making improvements the local water supply.[5] He also assisted Khazim ibn Khuzayma al-Tamimi during the latter's campaign against Kharijite rebels in Oman in 750–1 by providing him with ships to transport his army,[6] and in 754 he allowed his brother Abdallah take refuge in Basra after the failure of his rebellion against al-Mansur. He and Isa ibn Ali eventually delivered their brother to al-Mansur on the condition that his life be spared, but this agreement was quickly violated and the caliph surreptitiously put Abdallah to death.[7]