Ezekiel 44:25-27
44:25 “‘They must not come near a dead person or they will be defiled; however, for father, mother, son, daughter, brother or sister, they may defile themselves.
44:26 After a priest has become ceremonially clean, they must count off a period of seven days for him.
44:27 On the day he enters the sanctuary, into the inner court to serve in the sanctuary, he must offer his sin offering, declares the sovereign Lord.