Valmiki Ramayana 6.44.25

राक्षसानां च निनदैर्हरीणां चापि निस्वनैः ।सा बभूव निशा घोरा भूयो घोरतरा तदा॥

rākṣasānāṃ ca ninadairharīṇāṃ cāpi nisvanaiḥ |sā babhūva niśā ghorā bhūyo ghoratarā tadā ||

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