Numbers 6:9-11

9‘And if anyone dies very suddenly beside him, and he defiles his consecrated head, then he shall shave his head on the day of his cleansing; on the seventh day he shall shave it.

10Then on the eighth day he shall bring two turtledoves or two young pigeons to the priest, to the door of the tabernacle of meeting;

11and the priest shall offer one as a sin offering and the other as a burnt offering, and make atonement for him, because he sinned in regard to the corpse; and he shall sanctify his head that same day.