Śatapatha Brāhmaṇa ("of a hundred paths") 6.3.3.8

6.3.3.8

āgatya vājyadhvānamiti | āgato hyasyādhvā bhavati sarvā mṛdho vidhūnuta iti pāpmā vai mṛdhaḥ sarvānpāpmano vidhūnuta ityetattasmādu haitadaśvaḥ syanttvā vidhūnute 'gniṃ sadhasthe mahati cakṣuṣā nicikīṣa itīdaṃ vai mahatsadhasthamagnimasminmahati sadhasthe cakṣuṣā didṛkṣata ityetat

[Vâg. S. XI, 18] 'The courser, having started on his way,'--for his way has indeed been started upon;--'shaketh off all assaults,'--assaults mean evils: thus, 'shakes off all evils;' and hence, indeed, the horse, whilst running, shakes itself;--'Agni he seeks to descry with his eye on the great seat;'--the great seat doubtless is this sacrificial (place): thus, 'Agni he wishes to see with his eye on this great seat.'