Mahabharata Adi Parva Chapter 82:2

Mahabharata Adi Parva Chapter 82:2 As for myself, I dare not speak an untruth even if the greatest loss threatens me!' Sarmishtha answered, 'O monarch, one may look upon her friend's husband as her own. One's friend's marriage is the same as one's own. Thou hast been chosen by my friend as her husband. Thou art as much my husband, therefore.' Yayati then said, 'It is, indeed my vow always to grant what one asketh. As thou askest me, tell me then what I am to do.' Sarmishtha then said, 'Absolve me, O king, from sin. Protect my virtue. Becoming a mother by thee, let me practise the highest virtue in this world. It is said, O king, that a wife, a slave, and a son can never earn wealth for themselves. What they earn always belongeth to him who owneth them. I am, indeed, the slave of Devayani. Thou art Devayani's master and lord. Thou art, therefore, O king, my master and lord as much as Devayani's! I solicit thee! O, fulfil my wishes!' "Vaisampayana continued, 'Thus addressed by Sarmishtha, the monarch was persuaded into the truth of all she spoke. He therefore, honoured Sarmishtha by protecting her virtue. And they passed some time together. And taking affectionate farewell of each other, they then parted, each returning to whence he or she had come. "And it came to pass that Sarmishtha of sweet smiles and fair eyebrows conceived in consequence of that connection of hers with that best of monarchs. And, O king, that lotus-eyed lady then in due course of time brought forth a son of the splendour of a celestial child and of eyes like-lotus-petals.'"