Leviticus 21:4

American King James Version (1999)

But he shall not defile himself, being a chief man among his people, to profane himself.

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And for his sister a virgin, that is near to him, which has had no husband; for her may he be defiled.

They shall not make baldness on their head, neither shall they shave off the corner of their beard, nor make any cuttings in their flesh.