Valmiki Ramayana 6.99.18

तं तैलधौतं विमलं शैलसारमयं दृढम्।राक्षसः परमक्रुद्धो वालिपुत्रे न्यपातयत्॥

taṃ tailadhautaṃ vimalaṃ śailasāramayaṃ dṛḍham |rākṣasaḥ paramakruddho vāliputre nyapātayat ||

Our plain-language meaning of this verse is waiting for scholar review.