Valmiki Ramayana 6.74.60

स ब्रह्मकोशं रजतालयं च शक्रालयं रुद्रशरप्रमोक्षम्।हयाननं ब्रह्मशिरश्च दीप्तं ददर्श वैवस्वतकिङ्करांश्च॥

sa brahmakośaṃ rajatālayaṃ ca śakrālayaṃ rudraśarapramokṣam |hayānanaṃ brahmaśiraśca dīptaṃ dadarśa vaivasvatakiṅkarāṃśca ||

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