Valmiki Ramayana Kishkindha Kanda Sarga 10 Shloka 28
Original Shlokaऋष्यमूकं गिरिवरं भार्याहरणदुःखितः। प्रविष्टोऽस्मि दुराधर्षं वालिनः कारणान्तरे4.10.28।।
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भार्याहरणदुःखितः tormented by the abduction of my wife, कारणान्तरे for some other reason, वालिनः for Vali, दुराधर्षम् inaccessible, गिरिवरम् great mountain, ऋष्यमूकम् Rishyamuka, प्रविष्टः अस्मि I have come.
'Tormented by the abduction of my wife by Vali, I came to the great Rishyamuka mountain inaccessible to Vali for some other reason.