Śatapatha Brāhmaṇa ("of a hundred paths") 3.3.1.2

3.3.1.2

sa vai vāca eva rūpeṇānunikrāmati | vasvyasyaditirasyādityāsi rudrāsi candrāsīti vasvī hyeṣāditirhyeṣādityā hyeṣā rudrā hyeṣā candrā hyeṣā bṛhaspatiṣṭvā sumne ramṇātviti brahma vai bṛhaspatirbṛhaspatiṣṭvā sādhunāvartayatvityevaitadāha rudro vasubhirācaka ityapraṇāśāyaitadāha rudraṃ hi nāti paśavaḥ

It is as Vâk that he steps into them; (with the text, Vâg. S. IV, 21), 'Thou art a Vasvî, thou art Aditi, thou art an Âdityâ, thou art a Rudrâ, thou art Kandrâ; for she is indeed a Vasvî and Aditi, an Âdityâ, a Rudrâ, Kandrâ. 'May Brihaspati make thee rest in happiness!'--Brihaspati being the Brahman, he thereby means to say, 'May Brihaspati lead thee hither by means of the good (work)!' 'Rudra, together with the Vasus, is well-pleased with thee:' this he says to secure her (the cow's) safety, for cattle cannot pass beyond Rudra.