Adi Parva 104.3

When the earth was thus in olden time made Kshatriya-less by that great Rishi, the Kshatriya women raised children by the Brahmanas, learned in the Vedas. They went to the Brahmanas not lustfully, but from virtuous motives. It is said in the Vedas that the son so raised belongs to him that had married the mother.