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25They shall go in to no dead person to defile themselves; but for father, or for mother, or for son, or for daughter, for brother, or for sister who has had no husband, they may defile themselves. 26After he is cleansed, they shall reckon to him seven days. 27In the day that he goes into the sanctuary, into the inner court, to minister in the sanctuary, he shall offer his sin-offering, says the Lord Yahweh.
Ezekiel 44:25-27 (WEB)