Śatapatha Brāhmaṇa ("of a hundred paths") 2.6.2.11

2.6.2.11

atha punaretya japanti | ava rudramadīmahyava devaṃ tryambakam yathā no vasyasaskaradyathā naḥ śreyasaskaradyathā no vyavasāyayāt bheṣajamasi bheṣajaṃ gave 'śvāya puruṣāya bheṣajaṃ sukham meṣāya meṣyā ityāśīrevaiṣaitasya karmaṇaḥ

Thereupon they return (to the fire) and mutter (Vâg. S. III, 58, 59), 'We have satisfied the claims of Rudra, satisfied the divine Tryambaka, that he may make us richer, that he may make us more prosperous, that he may render us steady in our purpose.--Thou (O Rudra) art a remedy for the cow, a remedy for the horse, a remedy for man; a blessing for the ram and the ewe.' This is the prayer for blessing at this performance.