Leviticus 21:3

Catholic Public Domain Version

or a virgin sister, who is not married to a husband.

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except only by his blood-relatives and near-relatives, that is, by a father or mother, or by a son or daughter, or also a brother,

But not even by the leader of his people shall he be contaminated.

If the daughter of a priest has been married to any of the people, she shall not eat from what has been sanctified, nor from the first-fruits.