RV 1.63.6
त्वां ह त्यद् इन्द्रार्णसातौ स्वर्मीळ्हे नर आजा हवन्ते । तव स्वधाव इयम् आ समर्य ऊतिर् वाजेष्व् अतसाय्या भूत् ॥
tvāṃ ha tyad indrārṇasātau svarmīḷhe nara ājā havante | tava svadhāva iyam ā samarya ūtir vājeṣv atasāyyā bhūt ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Hence men invoke thee, Indra, in the tumult of battle, in the light-bestowing conflict. This aid of thine, O Godlike One, was ever to be implored in deeds of might in combat.
Translated by Ralph T. H. Griffith (1896)