Ramayana
राक्षसैः सा परित्यक्ता पुरा विष्णुभयार्दितैः । शून्या रक्षोगणैः सर्वै रसातलतलं गतैः ॥ 7-3-29 ॥
Long ago that city was abandoned by the Rakshasas who were tormented by fear of Vishnu, and it stands empty, all the hosts of demons having gone down to the netherworld of Rasatala.
english translation