Numbers 6:8

6“‘All the days that he separates himself to the LORD he shall not go near a dead body.

7He shall not make himself unclean for his father, or for his mother, for his brother, or for his sister, when they die, because his separation to God is on his head.

8All the days of his separation he is holy to the LORD.

9“‘If any man dies very suddenly beside him, and he defiles the head of his separation, then he shall shave his head in the day of his cleansing. On the seventh day he shall shave it.

10On the eighth day he shall bring two turtledoves or two young pigeons to the priest, to the door of the Tent of Meeting.