Valmiki Ramayana 2.6.18
प्रकाशकरणार्धं च निशागमनशञ्कया ।दीपवृक्षां स्तथाचक्रु रनुर्थ्यसु सर्वशः॥
prakāśakaraṇārdhaṃ ca niśāgamanaśañkayā |dīpavṛkṣāṃ stathācakru ranurthyasu sarvaśaḥ ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book