RV 10.66.8
धृतव्रताः क्षत्रिया यज्ञनिष्कृतो बृहद्दिवा अध्वराणाम् अभिश्रियः । अग्निहोतार ऋतसापो अद्रुहो ऽपो असृजन्न् अनु वृत्रतूर्ये ॥
dhṛtavratāḥ kṣatriyā yajñaniṣkṛto bṛhaddivā adhvarāṇām abhiśriyaḥ | agnihotāra ṛtasāpo adruho 'po asṛjann anu vṛtratūrye ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Potent, with firm-fixt laws, arranging sacrifice, visiting solemn rites in splendour of the day, Obeying Order, these whose priest is Agni, free from falsehood, poured the waters out when Vrtra died.
Translated by Ralph T. H. Griffith (1896)