Surya Siddhanta
भूवृत्तपादे पूर्वस्याम् यमकोटीति विश्रुता । भद्राश्ववर्षे नगरी स्वर्णप्राकारतोरणा॥
At a quadr.ant of the earth's circumference eastward, in the clime (varshd) Bhadracva, is the city famed as Yamakoti, having walls and gateways of gold.
english translation