Valmiki Ramayana 6.80.26
नैव ज्यातलनिर्घोषो न च नेमिखुरस्वनः।शश्रुवे चरतस्तस्य न च रूपं प्रकाशते॥
naiva jyātalanirghoṣo na ca nemikhurasvanaḥ |śaśruve caratastasya na ca rūpaṃ prakāśate ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book