RV 2.12.12
यः सप्तरश्मिर् वृषभस् तुविष्मान् अवासृजत् सर्तवे सप्त सिन्धून् । यो रौहिणम् अस्फुरद् वज्रबाहुर् द्याम् आरोहन्तं स जनास इन्द्रः ॥
yaḥ saptaraśmir vṛṣabhas tuviṣmān avāsṛjat sartave sapta sindhūn | yo rauhiṇam asphurad vajrabāhur dyām ārohantaṃ sa janāsa indraḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Who with seven guiding reins, the Bull, the Mighty, set free the Seven great Floods to flow at pleasure; Who, thunder-armed, rent Rauhina in pieces when scaling heaven, He, O ye men, is Indra.
Translated by Ralph T. H. Griffith (1896)