Valmiki Ramayana Sundara Kanda Sarga 53 Shloka 37
Original Shlokaयदि तावत्समुद्रस्य मैनाकस्य च धीमतः।।5.53.37।। रामार्थं सम्भ्रमस्तादृक्किमग्निर्न करिष्यति।
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समुद्रस्य for the ocean, धीमतः of the wise, मैनाकस्य for Mainaka, रामार्थम् for the cause of Rama, तादृक् such, सम्भ्रमः यदि if there was anxiety, अग्निः fire, किम् what, न करिष्यति not do?
'If the anxiety of the ocean and the wise Mainaka mountain is to serve Rama what is it that the fire cannot do?