Mambo ya Walawi 20 : 17 Leviticus chapter 20 verse 17

Tena mtu mume akimwoa umbu lake, binti ya baba yake, au binti ya mama yake, na kuuona utupu wake, na huyo mwanamke kauona utupu wake huyo mume; ni jambo la aibu; watakatiliwa mbali mbele ya macho ya wana wa watu wao; amefunua utupu wa umbu lake; naye atauchukua uovu wake.
soma Mlango wa 20

"'If a man takes his sister, his father's daughter, or his mother's daughter, and sees her nakedness, and she sees his nakedness; it is a shameful thing; and they shall be cut off in the sight of the children of their people: he has uncovered his sister's nakedness; he shall bear his iniquity.