Valmiki Ramayana 6.17.25
प्रकृत्या राक्षसो ह्येष भ्रातामित्रस्य वै प्रभो ।आगतश्च रिपोः साक्षात्कथमस्मिम्श्च विश्वसेत्॥
prakṛtyā rākṣaso hyeṣa bhrātāmitrasya vai prabho |āgataśca ripoḥ sākṣātkathamasmimśca viśvaset ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book