RV 4.17.7
त्वम् अध प्रथमं जायमानो ऽमे विश्वा अधिथा इन्द्र कृष्टीः । त्वम् प्रति प्रवत आशयानम् अहिं वज्रेण मघवन् वि वृश्चः ॥
tvam adha prathamaṃ jāyamāno 'me viśvā adhithā indra kṛṣṭīḥ | tvam prati pravata āśayānam ahiṃ vajreṇa maghavan vi vṛścaḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Moreover, when thou first wast born, O Indra, thou struckest terror into all the people. Thou, Maghavan, rentest with thy bolt the Dragon who lay against the waterfloods of heaven.
Translated by Ralph T. H. Griffith (1896)