Shatapatha Brahmana 5.1.5.16

5.1.5.16

atha yadyadhvaryoḥ | antevāsī vā brahmacārī vaitadyajuradhīyātso 'nvāsthāya vācayati vājina iti vājino hyaśvāstasmādāha vājina iti vājajita ityannaṃ vai vājo 'nnajita ityevaitadāhādhvana skabhnuvanta ityadhvano hi skabhnuvanto dhāvanti yojanā mimānā iti yojanaśo hi mimānā adhvānaṃ dhāvanti kāṣṭhāṃ gacateti yathainānantarā nāṣṭrā rakṣāṃsi na hiṃsyurevametadāha dhāvantyājimāghnanti dundubhīnabhi sāma gāyati

And even as then Brihaspati hasted up to Savitri for his impulsion,--Savitri being the impeller among the gods--saying, 'Impel this for me: impelled by thee, may I win this!' and Savitri, as the impeller, impelled it for him, and impelled by Savitri, he won; in like manner does he thereby haste up to Savitri for his impulsion,--Savitri being the impeller among the gods,--saying, 'Impel this for me: impelled by thee, may I win!' and Savitri, as the impeller, impels it for him, and impelled by Savitri he wins.