Leviticus 22:14-16

22:14 “‘If a man eats a holy offering by mistake, he must add one fifth to it and give the holy offering to the priest. 22:15 They must not profane the holy offerings which the Israelites contribute to the Lord, 22:16 and so cause them to incur a penalty for guilt when they eat their holy offerings, for I am the Lord who sanctifies them.’”