The Idrisid Emirate of Asir was a short-lived state located on the Arabian Peninsula. The Emirate was located in the geographical region of Jizan in what is now southwestern Saudi Arabia. The authority of the Emir was restricted to a strip of the Tihamah some 80 mi (129 km) long and extending about 40 mi (64 km) inland to the scarp of highland Asir, with Sabya as capital and Jizan and Midi as ports.
R.L. Headley, ʿAsīr, Encyclopaedia of Islam, Second Edition.
A. K. Bang, The Idrisi State of Asir 1906-1934: Politics, Religion and Personal Prestige as State-building factors in early twentieth century Arabia, Bergen Studies on the Middle East and Africa (1996)