RV 5.30.4
स्थिरम् मनश् चकृषे जात इन्द्र वेषीद् एको युधये भूयसश् चित् । अश्मानं चिच् छवसा दिद्युतो वि विदो गवाम् ऊर्वम् उस्रियाणाम् ॥
sthiram manaś cakṛṣe jāta indra veṣīd eko yudhaye bhūyasaś cit | aśmānaṃ cic chavasā didyuto vi vido gavām ūrvam usriyāṇām ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Indra, when born, thou madest firm thy spirit: alone thou seekest war to fight with many. With might thou clavest e'en the rock asunder, and foundest out the stable of the Milch-kine.
Translated by Ralph T. H. Griffith (1896)