Ezekiel 44:25-27

“A priest must not defile himself by going near a dead person; however, if the dead person was his father or mother, son or daughter, brother, or unmarried sister, then he may defile himself. After his purification, he must wait seven days. And the first day he goes back into the inner court to minister in the Holy Place, he must offer his sin offering. I, Lord YAHWEH, have spoken.”