'Razor' in the Bible

for lo, you shall conceive and bear a son. No razor shall come upon his head, for the boy shall be a Nazirite to God from birth; and he shall begin to deliver Israel from the hand of the Philistines."

And he told her all his mind, and said to her, "A razor has never come upon my head; for I have been a Nazirite to God from my mother's womb. If I be shaved, then my strength will leave me, and I shall become weak, and be like any other man."