Ezekiel 44:25-27

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.