Valmiki Ramayana 7.51.30
एवं गते न सन्तापं कर्तुमर्हसि राघव ।सीतार्थे राघवार्थे वा दृढो भव नरोत्तम॥
evaṃ gate na santāpaṃ kartumarhasi rāghava |sītārthe rāghavārthe vā dṛḍho bhava narottama ||
Our plain-language meaning of this verse is waiting for scholar review.
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