Leviticus 22:17

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.

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;

[Ye shall offer] at your own will a male without blemish, of the beeves, of the sheep, or of the goats.