RV 6.21.12
स नो बोधि पुरएता सुगेषूत दुर्गेषु पथिकृद् विदानः । ये अश्रमास उरवो वहिष्ठास् तेभिर् न इन्द्राभि वक्षि वाजम् ॥
sa no bodhi puraetā sugeṣūta durgeṣu pathikṛd vidānaḥ | ye aśramāsa uravo vahiṣṭhās tebhir na indrābhi vakṣi vājam ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
On good and evil ways be thou our Leader, thou who art known to all as Path-preparer. Bring power to us, O Indra, with thy Horses, Steeds that are best to draw, broad-backed, unwearied.
Translated by Ralph T. H. Griffith (1896)