RV 7.21.3
त्वम् इन्द्र स्रवितवा अपस् कः परिष्ठिता अहिना शूर पूर्वीः । त्वद् वावक्रे रथ्यो न धेना रेजन्ते विश्वा कृत्रिमाणि भीषा ॥
tvam indra sravitavā apas kaḥ pariṣṭhitā ahinā śūra pūrvīḥ | tvad vāvakre rathyo na dhenā rejante viśvā kṛtrimāṇi bhīṣā ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Indra, thou settest free the many waters that were encompassed, Hero, by the Dragon. Down rolled, as if on chariots borne, the rivers: through fear of thee all things created tremble.
Translated by Ralph T. H. Griffith (1896)