Ezekiel 44:25-27

25They must not come near a dead person to defile themselves—only for a father, mother, son, daughter, brother or sister who had no husband may they defile themselves.

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

27On the day he goes into the Sanctuary, into the inner court to minister in the Sanctuary, he is to offer his sin offering.” It is a declaration of Adonai.