Ramayana
नारदस्तु महातेजा देवर्षिरमितप्रभः । अब्रवीन्मेघपृष्ठस्थो रावणं पुष्पके स्थितम् ॥ 7-20-3 ॥
And Narada, the divine sage of mighty splendor and measureless radiance, seated upon the back of a cloud, spoke to Ravana, who stood in the Pushpaka chariot.
english translation