Rig Veda
स जा॒तेभि॑र्वृत्र॒हा सेदु॑ ह॒व्यैरुदु॒स्रिया॑ असृज॒दिन्द्रो॑ अ॒र्कैः । उ॒रू॒च्य॑स्मै घृ॒तव॒द्भर॑न्ती॒ मधु॒ स्वाद्म॑ दुदुह॒अ जेन्या॒ गौः ॥ स जातेभिर्वृत्रहा सेदु हव्यैरुदुस्रिया असृजदिन्द्रो अर्कैः । उरूच्यस्मै घृतवद्भरन्ती मधु स्वाद्म दुदुहे जेन्या गौः ॥
Indra, the slayer of Vṛtra,let loose the milch kine, assisted by the Maruts, born for his aid, and entitled to praises and oblations, and the excellent (cows) contributing abundantly to sacred offerings, and yielding the butter of libation, milked for him sweet (sacrificial) food.
english translation