Mambo ya Walawi 21 : 3 Leviticus chapter 21 verse 3

na kwa ajili ya umbu lake aliye mwanamwali, aliye wa udugu kwake, ambaye hajaolewa na mume; ana ruhusa kujitia unajisi kwa ajili yake huyo.
soma Mlango wa 21

and for his virgin sister who is near to him, who has had no husband; for her he may defile himself.