During the entire period of their Nazirite vow, no razor may be used on their head. They must be holy until the period of their dedication to the LORD is over; they must let their hair grow long
“‘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.
