Mambo Ya Walawi 18:9

“ ‘Usikutane kimwili na dada yako, wala binti wa baba yako, au binti wa mama yako, awe amezaliwa katika nyumba hiyo au mahali pengine.

The nakedness of thy sister, the daughter of thy father, or daughter of thy mother, whether she be born at home, or born abroad, even their nakedness thou shalt not uncover.