Surya Siddhanta
उदक् सिद्धपुरी नाम कुरुवर्षे प्रकीर्तिता । तस्याम् सिद्धा महात्मानो निवसन्ति गतव्यथाः॥
Northward, in the clime Kuril, is declared to be the city called that of the Perfected (siddha) ; in it dwell the magnanimous Perfected, free from trouble.
english translation