Valmiki Ramayana 3.48.10
मम पारे समुद्रस्य लंका नाम पुरी शुभा ।संपूर्णा राक्षसैः घोरैः यथा इन्द्रस्य अमरावती॥
mama pāre samudrasya laṃkā nāma purī śubhā |saṃpūrṇā rākṣasaiḥ ghoraiḥ yathā indrasya amarāvatī ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book