Valmiki Ramayana Yuddha Kanda Sarga 108 Shloka 11
Original Shlokaतदप्रमादमातिष्ठन्प्रत्युद्गच्छरथंरिपोः । विध्वंसयितुमिच्छामिवायुर्मेघमिवोत्थितम् ।।6.108.11।।
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तत् then, अप्रमादम् being alert, अतिष्ठ staying, रिपोः enemy, रथम् chariot, प्रत्युद्गच्छ towards him, वायुः wind, उत्थितम् excessively rising, मेघमिव like cloud, विध्वंसयितुम् destroy him, इ च्छामि wish to
"Being alert, you drive the chariot towards Ravana, just as wind drives the cloud in the sky, as I wish to destroy him."