Bible Verses About Nazarites: Cutting or shaving the head

All the time of his separation no razor shall pass over his head, until the day be fulfilled of his consecration to the Lord. He shall be holy, and shall let the hair of his head grow.

Because thou shalt conceive, and bear a son, and no razor shall touch his head: for he shall be a Nazarite of God, from his infancy, and from his mother's womb, and he shall begin to deliver Israel from the hands of the Philistines.

Then opening the truth of the thing, he said to her: The razor hath never come upon my head, for I am a Nazarite, that is to say, consecrated to God from my mother's womb: If my head be shaven, my strength shall depart from me, and I shall become weak, and shall be like other men.