एतमृग्वेदमभ्यतपस्तस्याभितप्तस्य य- शस्तेज इन्द्रियं वीर्यमन्नाद्यं रसोऽजा- यत ॥ ३ ॥
In plain words
He concentrated deeply upon this Rigveda. From that intensely heated Veda, its essence was born—radiance, sensory vigor, vital energy, and sustaining nourishment.
Close to the Sanskrit
He heated this Rigveda intensely. Of that heated [Veda], whatever radiance, sensory vigor, vital energy, and food-sustenance existed, that essence was born.