Numbers 6:2; Numbers 6:18

2 "Speak to the people of Israel and say to them, When either a man or a woman makes a special vow, the vow of a Nazirite,to separate himself to the LORD,

18 And the Nazirite shall shave his consecrated head at the entrance of the tent of meeting and shall take the hair from his consecrated head and put it on the fire that is under the sacrifice of the peace offering.