Atharvaveda 20.15.3

20.15.3

asmái bhīmā́ya námasā sám adhvará úṣo ná śubhra ā́ bharā pánīyase |
yásya dhā́ma śrávase nā́mendriyáṃ jyótir ákāri haríto nā́yase ||3||

To him the terrible, most worthy of high praise, like radiant
Dawn, bring gifts with reverence in this rite,
Whose being, for renown, yea, Indra-power and light, have been created, like bay steeds, to move with speed.