Numbers 6:2

6:2 “Speak to the Israelites, and tell them, ‘When either a man or a woman takes a special vow, to take a vow as a Nazirite, to separate himself to the Lord,

Numbers 6:18

6:18 “‘Then the Nazirite must shave his consecrated head at the entrance to the tent of meeting and must take the hair from his consecrated head and put it on the fire where the peace offering is burning.