Leviticus 22:16 (KJV)

And if a man eat of the holy thing unwittingly, then he shall put the fifth part thereof unto it, and shall give it unto the priest with the holy thing.

And they shall not profane the holy things of the children of Israel, which they offer unto the Lord;

Or suffer them to bear the iniquity of trespass, when they eat their holy things: for I the Lord do sanctify them.

And the Lord spake unto Moses, saying,

Speak unto Aaron, and to his sons, and unto all the children of Israel, and say unto them, Whatsoever he be of the house of Israel, or of the strangers in Israel, that will offer his oblation for all his vows, and for all his freewill offerings, which they will offer unto the Lord for a burnt offering;