RV 6.1.1
त्वं ह्य् अग्ने प्रथमो मनोतास्या धियो अभवो दस्म होता । त्वं सीं वृषन्न् अकृणोर् दुष्टरीतु सहो विश्वस्मै सहसे सहध्यै ॥
tvaṃ hy agne prathamo manotāsyā dhiyo abhavo dasma hotā | tvaṃ sīṃ vṛṣann akṛṇor duṣṭarītu saho viśvasmai sahase sahadhyai ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Thou, first inventor of this prayer, O Agni, Worker of Marvels, hast become our Herald. Thou, Bull, hast made us strength which none may conquer, strength that shall overcome all other prowess.
Translated by Ralph T. H. Griffith (1896)