Leviticus 18:9-11

Living Bible

⁹ Do not have intercourse with your sister or half sister, whether the daughter of your father or your mother, whether brought up in the same household or elsewhere.

¹⁰ “You shall not have intercourse with your granddaughter—the daughter of either your son or your daughter—for she is a close relative.^{[a] 11} You may not have intercourse with a half sister—your father’s wife’s daughter;