RV 8.21.2
उप त्वा कर्मन्न् ऊतये स नो युवोग्रश् चक्राम यो धृषत् । त्वाम् इद् ध्य् अवितारं ववृमहे सखाय इन्द्र सानसिम् ॥
upa tvā karmann ūtaye sa no yuvograś cakrāma yo dhṛṣat | tvām id dhy avitāraṃ vavṛmahe sakhāya indra sānasim ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
On thee for aid in sacrifice. This youth of ours, the bold, the mighty, hath gonse forth. We therefore, we thy friends, Indra, have chosen thee, free-giver, as our Guardian God.
Translated by Ralph T. H. Griffith (1896)