Imamat 20:17

Jika seorang laki-laki menikahi saudarinya sendiri, baik saudari kandung maupun saudari tiri yang berasal dari satu ayah atau satu ibu, mereka akan disingkirkan dari antara umat yang taat pada perjanjian-Ku. Mereka sudah melakukan perbuatan hina dan biarlah mereka menanggung akibat dari perbuatan itu.

And if a man shall take his sister, his father’s daughter, or his mother’s daughter, and see her nakedness, and she see his nakedness; it is a wicked thing; and they shall be cut off in the sight of their people: he hath uncovered his sister’s nakedness; he shall bear his iniquity.