Valmiki Ramayana Kishkindha Kanda Sarga 52 Shloka 17
Original Shlokaयत्त्वया रक्षितास्सर्वे म्रियमाणा बुभुक्षया।।4.52.17।। ब्रूहि प्रत्युपकारार्थं किं ते कुर्वन्तु वानराः।
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बुभुक्षया by starvation, म्रियमाणाः dying, सर्वे all, यत् as such, त्वया by you, रक्षिताः saved, वानराः monkeys, ते to you, प्रत्युपकारार्थम् to repay you in turn, किं कुर्वन्तु what can they do, ब्रूहि tell.
'We were dying from hunger when you saved us. Tell us what the monkeys can do to repay your debt?'.