Valmiki Ramayana 6.7.14
महाज्वरेण दुर्धर्षम् यमलोकमहार्णवम् ।अवगाह्य त्वया राजन् यमस्य बल सागरम्॥
mahājvareṇa durdharṣam yamalokamahārṇavam |avagāhya tvayā rājan yamasya bala sāgaram ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book