Gen 11:29

11:29 Sarai. She was the daughter of Terah by a different mother than Abraham’s (20:2). The prohibition against such a marriage was unknown in patriarchal times (cf. Lev. 18:9; 20:17; Deut. 27:22).

Nahor’s wife . . . daughter of Haran. The later Mosaic law did not prohibit marriage to one’s niece.