Valmiki Ramayana 6.96.1

आर्तानां राक्षसीनां तु लङ्कायां वै कुले कुले।रावणः करुणं शब्दं शुश्राव परिदेवितम्॥

ārtānāṃ rākṣasīnāṃ tu laṅkāyāṃ vai kule kule |rāvaṇaḥ karuṇaṃ śabdaṃ śuśrāva paridevitam ||

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