Śatapatha Brāhmaṇa ("of a hundred paths") 5.4.3.14

5.4.3.14

mā na indra te vayaṃ turāṣāṭ | ayuktāso abrahmatā vidasāma tiṣṭhā rathamadhi yaṃ vajrahastā raśmīndeva yamase svaśvānityudyacatyevaitayābhīśavo vai raśmayastasmādāhā raśmīndeva yamase svaśvānityatha rathavimocanīyāni juhoti prīto ratho vimucyātā iti tasmādrathavimocanīyāni juhoti

[Vâg. S. X, 22], 'Lest, O Indra, overpowerer of the mighty, we be wanting thee, heedless through ungodliness,--mount thou, O divine wielder of the thunderbolt, the chariot which thou restrainest (as well as its) well-horsed reins.' With this (verse) he stops (the chariot);--reins (rasmi) means bridle (abhîsu): therefore he says, 'Thou restrainest the well-horsed reins???.' Thereupon he offers the (four oblations) relating to the unyoking of the chariot. 'Well-pleased the chariot shall be when unyoked,' he thinks, and therefore he offers the (oblations) relating to the unyoking of the chariot.