Ramayana
कुशस्य नगरी रम्या विन्ध्यपर्वतरोधसि । कुशावतीति नाम्ना सा कृता रामेण धीमता । श्रावस्तीति पुरी रम्या श्राविता च लवस्य ह ॥ 7-108-4 ॥
The wise Rama made Kusha's lovely city, on the slope of the Vindhya mountain, named Kushavati; and the beautiful city of Shravasti was assigned to Lava.
english translation