Ezekiel 44:25-27

25“They shall not defile themselves by coming near a dead person. Only for father or mother, for son or daughter, for brother or unmarried sister may they defile themselves.

26After he is cleansed, they shall count seven days for him.

27And on the day that he goes to the sanctuary to minister in the sanctuary, he must offer his sin offering in the inner court,” says the Lord God.