Valmiki Ramayana Sundara Kanda Sarga 38 Shloka 68
Original Shlokaरावणेनोपरुद्धां मां निकृत्य पापकर्मणा। त्रातुमर्हसि वीर त्वं पातालादिव कौशिकीम्।।5.38.68।।
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वीर hero, पापकर्मणा by the wicked, रावणेन by Ravana, निकृत्य after insulting, उपरुद्धाम् imprisonment, माम् me, त्वम् you, पातालात् from the underworld or Pataala, कौशिकीमिव like Kausik, त्रातुम् rescue me, अर्हसि is proper.
"O heroic Rama just as Kausik was rescued from the underworld it behoves you to deliver me from imprisonment of wicked Ravana".