RV 4.38.6
उत स्मासु प्रथमः सरिष्यन् नि वेवेति श्रेणिभी रथानाम् । स्रजं कृण्वानो जन्यो न शुभ्वा रेणुं रेरिहत् किरणं ददश्वान् ॥
uta smāsu prathamaḥ sariṣyan ni veveti śreṇibhī rathānām | srajaṃ kṛṇvāno janyo na śubhvā reṇuṃ rerihat kiraṇaṃ dadaśvān ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
And, fain to come forth first amid these armies, this way and that with rows of cars he rushes, Gay like a bridesman, making him a garland, tossing the dust, champing the rein that holds him.
Translated by Ralph T. H. Griffith (1896)