Valmiki Ramayana 7.99.9

दशवर्षसहस्राणि वाजिमेघानथाकरोत् ।वाजपेयान्दशगुणांस्तथा बहुसुवर्णकान्॥

daśavarṣasahasrāṇi vājimeghānathākarot |vājapeyāndaśaguṇāṃstathā bahusuvarṇakān ||

Our plain-language meaning of this verse is waiting for scholar review.