Valmiki Ramayana Yuddha Kanda Sarga 30 Shloka 30
Original Shlokaवक्तुंनशक्तोरामस्यनरःकश्चिद्गुणान् क्षितौ । जनस्थानगतायेनयावन्तोराक्षसाहताः ।।6.30.30।।
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येन by whom, जनस्थानगता approaching Janasthana, यावन्त all, राक्षसा Rakshasas, हता were killed, रामस्य by Rama, गुणान् virtues, वक्तुम् to speak of, नर human, कश्चित् even, क्षितौ to recount, नशक्त not possible.
"It is not even possible to recount the virtues of Rama who killed all the Rakshasas approaching Janasthana."