Numbers 6:2,5,9,18
2 “Speak to the children of Israel, and tell them: ‘When either man or woman shall make a special vow, the vow of a Nazirite, to separate himself to Yahweh,
5 “‘All the days of his vow of separation no razor shall come on his head, until the days are fulfilled, in which he separates himself to Yahweh. He shall be holy. He shall let the locks of the hair of his head grow long.
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.
18 The Nazirite shall shave the head of his separation at the door of the Tent of Meeting, and shall take the hair of the head of his separation, and put it on the fire which is under the sacrifice of peace offerings.