Mbh 1.99.5a

“One day, O bull of Bharata’s race, there came into those woods adored by the gods and celestial Rishis, the Vasus with Prithu at their head. And wandering there with their wives, they enjoyed themselves in those delightful woods and mountains. And as they wandered there, the slender-waisted wife of one of the Vasus, O thou of the prowess of Indra, saw in those woods Nandini, the cow of plenty. And seeing that cow possessing the wealth of all accomplishments, large eyes, full udders, fine tail, beautiful hoofs, and every other auspicious sign, and yielding much milk, she showed the animal to her husband Dyu. O thou of the prowess of the first of elephants, when Dyu was shown that cow, he began to admire her several qualities and addressing his wife, said, ‘O black-eyed girl of fair thighs, this excellent cow belongeth to that Rishi whose is this delightful asylum. O slender-waisted one, that mortal who drinketh the sweet milk of this cow remaineth in unchanged youth for ten thousand years.’ O best of monarchs, hearing this, the slender-waisted goddess of faultless features then addressed her lord of blazing splendour and said, ‘There is on earth a friend of mine, Jitavati by name, possessed of great beauty and youth. She is the daughter of that god among men, the royal sage Usinara, endued with intelligence and devoted to truth. I desire to have this cow, O illustrious one, with her calf for that friend of mine. Therefore, O best of celestials, bring that cow so that my friend drinking of her milk may alone become on earth free from disease and decrepitude. O illustrious and blameless one, it behoveth thee to grant me this desire of mine. There is nothing that would be more agreeable to me.’ On hearing these words of his wife, Dyu, moved by the desire of humouring her, stole that cow, aided by his brothers Prithu and the others.