Kabulistan (Persian: کابلستان) is a historical regional name referring to the territory that is centered on present-day Kabul Province of Afghanistan.[1][2]
During the 16h century, founder of the Mughal Empire, Babur states in his Baburnama, his memoirs: The people of Hindustān call every country beyond their own Khorasān, in the same manner as the Arabs term all except Arabia, Ajem. On the road between Hindustān and Khorasān, there are two great marts: the one Kābul, the other Kandahār. Caravans, from Ferghāna, Tūrkestān, Samarkand, Balkh, Bokhāra, Hissār, and Badakhshān, all resort to Kābul; while those from Khorasān repair to Kandahār. This country lies between Hindustān and Khorasān.[4]
In many Greek and Latin sources, particularly editions of Ptolemy's Geography, the name of the region is given as Cabolitae (Καβολῖται). European writers in the 18th to the 20th centuries sometimes referred to Durrani Empire as the Kingdom of Caboul.[5]
^"History of Afghanistan, from the Earliest Period to the Outbreak of the War of 1878", p.2, George Bruce Malleson, Elibron Classics Series, 2005 Adament Media Corporation, LINK