Mahabharata 5.107.12
अत्र राक्षसराजेन पौलस्त्येन महात्मनारावणेन तपश्चीर्त्वा सुरेभ्योऽमरता वृता
atra rākṣasarājena paulastyena mahātmanārāvaṇena tapaścīrtvā surebhyo'maratā vṛtā
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book