रुचिर् असि रोचो ऽसि । स यथा त्वं रुच्या रोचो ऽस्य् एवाहं पशुभिश् च ब्राह्मणवर्चसेन च रुचिषीय ॥२१॥
rucir asi roco 'si | sa yathā tvaṃ rucyā roco 'sy evāhaṃ paśubhiś ca brāhmaṇavarcasena ca ruciṣīya ||21||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Brightness art thou, bright art thou; as thou by brightness art bright, so may I by both cattle and Brahman-splendor be bright (ruc).
Translated by William Dwight Whitney (1905)