Valmiki Ramayana Kishkindha Kanda Sarga 53 Shloka 7
Original Shlokaतपसस्तु प्रभावेन नियमोपार्जितेन च। सर्वानेव बिलादस्मादुद्धरिष्यामि वानरान्।।4.53.7।।
1 source checked for this shloka
नियमोपार्जितेन earned by practising, तपसः by asceticism, तु प्रभावेन by virtue of it, सर्वानेव all of you, वानरान् monkeys, अस्मात् बिलात् from this cave, उद्धरियिष्यामि I will help you out.
'I will help all monkeys out of this cave by virtue of my power of asceticism duly practised.