Shatapatha Brahmana 6.8.1.1

6.8.1.1

vanīvāhyetāgnim bibhradityāhuḥ | devāścāsurāścobhaye prājāpatyā aspardhanta te devāścakramacarañcālamasurā āsaṃste devāścakreṇa caranta etatkamāpaśyaṃścakreṇa hi vai devāścaranta etatkarmāpaśyaṃstasmādanasa eva pauroḍāśeṣu yajūṃṣyanaso 'gnau

'Let him drive Agni about while keeping him up,' so they say. The gods and the Asuras, both of them sprung from Pragâpati, were contending. The gods drove about on wheels (cars), and the Asuras stayed at home. The gods, while driving about on wheels, saw this rite (sacrificial performance), for it was indeed in driving about on wheels that they saw this rite: hence it is to the cart that the formulas relate at the (performance with) sacrificial cakes, and to the cart in the building of the fire-altar.