Valmiki Ramayana 5.2.19

गिरिमूर्ध्नि स्थितां लङ्कां पाण्डुरैर्भवनैः शुभैः ।ददर्श स कपिश्रेष्ठः पुरमाकाशगं यथा॥

girimūrdhni sthitāṃ laṅkāṃ pāṇḍurairbhavanaiḥ śubhaiḥ |dadarśa sa kapiśreṣṭhaḥ puramākāśagaṃ yathā ||

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