Leviticus 21:4

New Revised Standard Version Updated Edition 2021

But he shall not defile himself for those related to him by marriage and so profane himself.

See the chapter Copy

likewise, for a virgin sister close to him because she has had no husband, he may defile himself for her.

They shall not make bald spots upon their heads or shave off the edges of their beards or make any gashes in their flesh.