RV 3.30.4
त्वं हि ष्मा च्यावयन्न् अच्युतान्य् एको वृत्रा चरसि जिघ्नमानः । तव द्यावापृथिवी पर्वतासो ऽनु व्रताय निमितेव तस्थुः ॥
tvaṃ hi ṣmā cyāvayann acyutāny eko vṛtrā carasi jighnamānaḥ | tava dyāvāpṛthivī parvatāso 'nu vratāya nimiteva tasthuḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
For, overthrowing what hath ne'er been shaken, thou goest forth alone destroying Vrtras. For him who followeth thy Law the mountains and heaven and earth stand as if firmly stablished.
Translated by Ralph T. H. Griffith (1896)