Shaving: Forbidden to Nazarites
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Numbers 6:5
For the entire period of his vow of separation, no razor shall pass over his head. He must be holy until the time of his separation to the LORD is complete; he must let the hair of his head grow long.
Judges 13:5
For behold, you will conceive and give birth to a son. And no razor shall come over his head, because the boy will be a Nazirite to God from the womb, and he will begin the deliverance of Israel from the hand of the Philistines.”