The Great Epic of the Bhārata dynasty 13.44.14

13.44.14

yasyāstu na bhavedbhrātā pitā vā bharatarṣabha |
nopayaccheta tāṃ jātu putrikādharmiṇī hi sā || 14 ||

The righteous condemn the practice of begetting issue upon Sudra women. A Brahmana, by begetting children upon a Sudra woman, incurs the liability of performing an expiation. A person of thirty years of age should wed a girl of ten years of age called a Nagnika. Or, a person of one and twenty years of age should wed a girl of seven years of age. That girl who has no brother nor father should not be wed, O chief of Bharata's race, for she may be intended as Putrika of her sire. After the appearance of puberty, the girl (if not married) should wait for three years. On the fourth year, she should look for a husband herself (without waiting any longer for her kinsmen to select one for her). The offspring of such a girl do not lose their respectability, nor does union with such a girl become disgraceful. If, instead of selecting a husband for herself, she acts otherwise, she incurs the reproach of Prajapati herself. One should wed that girl who is not a Sapinda of one's mother or of the same Gotra with one's father. Even this is the usage (consistent with the sacred law) which Manu has declared.'