Leviticus 20:19-21

“Don’t have sex with your aunt on either your mother’s or father’s side. That violates a close relative. Both of you are held responsible. “If a man has sex with his aunt, he has dishonored his uncle. They will be held responsible and die childless. “If a man marries his brother’s wife, it’s a defilement. He has shamed his brother. They will be childless.