Leviticus 19:9

Leaving the Gleanings

19:9 “‘When you gather in the harvest of your land, you must not completely harvest the corner of your field, and you must not gather up the gleanings of your harvest.

Leviticus 21:5

21:5 Priests must not have a bald spot shaved on their head, they must not shave the corner of their beard, and they must not cut slashes in their body.