Leviticus 22:4-5

4No man from the descendants of Aaron who is diseased or has a discharge may eat the holy offerings until he becomes clean. The one who touches anything made unclean by contact with a dead person, or a man who has a seminal emission,

5or a man who touches a swarming thing by which he becomes unclean, or touches a person by which he becomes unclean, whatever that person’s impurity –