Many holy rivers originating from various moun¬ tains flow here. They are : Those originating from the ridges or the Puranic evidence, M. Ali concludes that Gandhamadana is the northern ridge of the Hindukush arch with its northern extension, the Khwaja Mohammad range while Malyavan is the Sarikot range to the east of Pamirs. (Op. Cit., pp. 58-59)