Śatapatha Brāhmaṇa ("of a hundred paths") 5.1.4.8

5.1.4.8

sa yunakti | vāto vā mano veti na vai vātātkim canāśīyo 'sti na manasaḥ kiṃ canāśīyo 'sti tasmādāha vāto vā mano veti gandharvāḥ saptaviṃśatiste 'gre 'śvamayuñjanniti gandharvā ha vā agre 'śvaṃ yuyujustadye 'gre 'śvamayuñjaṃste tvā yuñjantvityevaitadāha te asminjavamādadhuriti tadye 'sminjavamādadhuste tvayi javamādadhatvityevaitadāha

He yokes it, with (Vâg. S. IX, 7), Either the wind, or thought--'for there is nothing swifter than the wind, and nothing swifter than thought:' therefore he says, 'Either the wind, or thought;--'(or) the seven and twenty Gandharvas, they yoked the horse at first;' for the Gandharvas indeed yoked the horse at first: 'May they who yoked the horse at first yoke thee!' this he thereby says they;--'laid speed into him,'--he thereby says, 'May they who laid speed into it, lay speed into thee!'