Mbh 1.122.2

“Vaisampayana said, ‘Thus addressed by his loving wife, king Pandu, well-acquainted with all rules of morality, replied in these words of virtuous import, ‘O Kunti, what thou hast said is quite true. Vyushitaswa of old did even as thou hast said. Indeed he was equal unto the celestials themselves. But I shall now tell thee about the practices of old indicated by illustrious Rishis, fully acquainted with every rule of morality. O thou of handsome face and sweet smiles, women formerly were not immured within houses and dependent on husbands and other relatives. They used to go about freely, enjoying themselves as best as they liked. O thou of excellent qualities, they did not then adhere to their husbands faithfully, and yet, O handsome one, they were not regarded sinful, for that was the sanctioned usage of the times. That very usage is followed to this day by birds and beasts without any (exhibition of) jealousy. That practice, sanctioned by precedent, is applauded by great Rishis. O thou of taper thighs, the practice is yet regarded with respect amongst the Northern Kurus. Indeed, that usage, so lenient to women, hath the sanction of antiquity. The present practice, however (of women’s being confined to one husband for life) hath been established but lately. I shall tell thee in detail who established it and why.