Mambo Ya Walawi 20:20

“ ‘Ikiwa mwanaume atakutana kimwili na shangazi yake, amemwaibisha mjomba wake. Nao watawajibika kwa ajili ya uovu huo; watakufa bila kuzaa mtoto.

And if a man shall lie with his uncle’s wife, he hath uncovered his uncle’s nakedness: they shall bear their sin; they shall die childless.