Leviticus 22:2-7

2“Tell Aaron and his sons to separate themselves from the holy things of Bnei-Yisrael, which they consecrate to Me, so that they would not profane My holy Name. I am Adonai.

3Tell them, if anyone of all your offspring throughout your generations approaches the holy things, which Bnei-Yisrael consecrate to Adonai, while in a state of uncleanness, that soul will be cut off from before Me. I am Adonai.

4“None of the offspring of Aaron who has tza'arat or has a discharge shall eat of the holy things until he is clean. Whoever touches anything that is unclean by the dead or a man whose seed discharges from him

5or who touches any creeping thing that may make him unclean or a person who is unclean—whatever his uncleanness—

6the person who touches any such thing will be unclean until the evening, and is not to eat of the holy things, unless he has bathed his body in water.

7When the sun sets, he will become clean, and afterward he may eat of the holy things, because it is his food.