Valmiki Ramayana Sundara Kanda Sarga 13 Shloka 54
Original Shlokaइहैव नियताहारो वत्स्यामि नियतेन्द्रियः।।5.13.54।। न मत्कृते विनश्येयुः सर्वे ते नरवानराः।
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नियताहारः restricting food, नियतेन्द्रियः controlling senses, इहैव here itself, वत्स्यामि I will stay, मत्कृते for my fault, ते those, नरवानराः naras and vanaras, न विनश्येयुः will not perish.
"I will stay here itself, restricting my food and controlling my senses. Let not men and monkeys perish for my fault.