Ramayana
ततो मेघा रथे तस्मिंस्तडित्त्वन्तो महाबलाः । अग्रतो वायुचपला नेदुः परमनिःस्वनाः ॥ 7-28-25 ॥
Then upon that chariot mighty clouds, laden with lightning and swift as the wind, rolled forward in front, thundering with a tremendous roar.
english translation