RV 1.52.2
स पर्वतो न धरुणेष्व् अच्युतः सहस्रमूतिस् तविषीषु वावृधे । इन्द्रो यद् वृत्रम् अवधीन् नदीवृतम् उब्जन्न् अर्णांसि जर्हृषाणो अन्धसा ॥
sa parvato na dharuṇeṣv acyutaḥ sahasramūtis taviṣīṣu vāvṛdhe | indro yad vṛtram avadhīn nadīvṛtam ubjann arṇāṃsi jarhṛṣāṇo andhasā ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Like as a mountain on firm basis, unremoved, he, thousandfold protector, waxed in mighty strength, When Indra, joying in the draughts of Soma juice, forced the clouds, slaying Vrtra stayer of their flow.
Translated by Ralph T. H. Griffith (1896)