Numbers 6:9-11

And if any man die very suddenly beside him, and he defile the head of his separation; then he shall shave his head in the day of his cleansing, on the seventh day shall he shave it. And on the eighth day he shall bring two turtle-doves, or two young pigeons, to the priest, to the door of the tent of meeting: and the priest shall offer one for a sin-offering, and the other for a burnt-offering, and make atonement for him, for that he sinned by reason of the dead, and shall hallow his head that same day.