Ezekiel 44:25-27

25A priest may not come near a dead person so that he becomes defiled. However, he may defile himself for a father, a mother, a son, a daughter, a brother, or an unmarried sister.

26After he is cleansed, he is to count off seven days for himself.

27On the day he goes into the sanctuary, into the inner court to minister in the sanctuary, he is to present his sin offering.” This is the declaration of the Lord God.