Its precise boundaries vary, but it is generally defined as the mostly highland region on either side of the Litani River, between the Mediterranean Sea in the west and the Wadi al-Taym, Beqaa and Hula valleys in the east.
'Amili oral tradition and later writings assert that a companion of the Islamic prophet Muhammad and an early supporter of Ali, Abu Dharr al-Ghifari (d. AD 651), introduced Shi'ism to the area.
[10] He mentions that another highland region, between Tyre, Sidon and Qadas, was known as 'Jabal Siddiqa' after a holy person's tomb in the district that was visited annually by throngs of local pilgrims and Muslim officials.
[12] The Damascene geographer al-Dimashqi described Jabal Amila in 1300 as a district in the Safad Province characterized by its abundant vineyards and olive, carob and terebinth groves, and populated by Twelver Shia Muslims.
[13] The ruler of Hama and scholar Abu'l-Fida (d. 1341) noted that Jabal Amila "runs down the coast as far south as Tyre and was home to the Shaqif Arnun fortress (Beaufort Castle).
[15] In the definition generally accepted by its Twelver Shia community, the Jabal Amil is roughly 3,000 square kilometres (1,200 sq mi) and bound by the Awali River north of Sidon, which separates it from the Chouf highlands of Mount Lebanon, and the Wadi al-Qarn in modern Israel to the south.
[17] In the definition of Lebanon specialist Elisabeth Picard, the northern boundary of Jabal Amil is formed by the Zahrani River, south of Sidon.
[20] A prominent native scholar of Jabal Amil, Suleiman Dahir, defined it in 1930 as a much larger area, encompassing Jezzine in the Chouf, Baalbek in the northern Beqaa, and the Hula.