Valmiki Ramayana Yuddha Kanda Sarga 58 Shloka 58
Original Shlokaहतेप्रहस्तेनीलेनतदकम्प्यंमहाबलम् । राक्षसानामहृष्टानांलङ्कामभिजगामह ।।6.58.58।।
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नीलेन by Neela, प्रहस्ते Prahastha, हते having been killed, अहृष्टानाम् cheerless, राक्षसानाम् of Rakshasas, अकम्प्यम् unshakeable, तत् बलम् that troops, लङ्काम् from Lanka, अभिजगामह could not stay there.
Prahastha having been killed by Neela, the cheerless Rakshasas and unshakeable troops could not stay there any more.