Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.4.9

5.2.4.9

tasya praṣṭivāhano 'śvaratho dakṣiṇā | trayo 'śvā dvau savyaṣṭhṛsārathī te pañca prāṇā yo vai prāṇaḥ sa vātastadyadetasya karmaṇa eṣā dakṣiṇā tasmātpañcavātīyaṃ nāma

For this (offering) a carriage and pair, with a side horse, is the priest's fee. Three horses, the warrior, and the charioteer,--these are five breaths, and the breath is the same as the wind: and because that is the fee for this sacrifice, therefore it is called Pañkavâtîya (belonging to the five winds).