Firishta's History (Gulshan-i Ibrāhīmī) 6.4.7

6.4.7

Returning to Bulkh, Mahmood gave the government of Hirat to his son, the Prince Ameer Musaood, appointing Aboo-Soheil Mahomed, the son of Hoossein Zowzuny, his vizier; and the government of Goorkan he conferred on his younger son, the Prince Ameer Mahomed, under the tutelage of Aboo-Bukr Koohistany. After the final settlement of the affairs of Khwarizm, the Ghiznian army was placed in cantonment for the winter at Boost. In the spring of the year 409, Mahmood, with an army consisting of 100,000 chosen horse, and 20,000 foot, raised in the countries of Toorkistan, Mawur-ool-Nehr, Kliorassan, and the adjacent provinces, undertook an expedition against Kunowj, which, from the time of Gooshtasp, the father of Darab, till this period, had not been visited by any foreign enemy. Kunowj was distant from Ghizny three months' march, and seven formidable rivers intervened. When Mahmood reached the confines of Kashmeer, the prince, whom he had established in that country, sent him presents of all that was curious and valuable in his kingdom, and was directed to accompany the army. The King, with much difficulty, conducted his troops a long and tedious march, till he entered the plains of Hindoostan, and driving all opposition before him, advanced to Kunowj.