Valmiki Ramayana Yuddha Kanda Sarga 28 Shloka 25
Original Shlokaनह्येषराघवस्यार्थेजीवितंपरिरक्षति । एषैवाशंसतेयुद्धेनिहन्तुंसर्वराक्षसान् ।।6.28.25।।
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एषः this, राघवस्यार्थे for the cause of Rama, जीवितम् life, नपरिरक्षतिहि not spare his life. एषैना he too, युद्धे in war, सर्वराक्षसान् all Rakshasas, विहन्तुम् destroy, आशिंपते intent upon.
"For the cause of Rama, he will spare his life. He too is intent upon destroying all Rakshasas."