Sefer HaChinuch ספר החינוך

To not eat lower-level consecrated foods (kodashim kalim) before the sprinkling of the bloods: To not eat anything from the lower-level consecrated foods before the sprinkling of the bloods. And lower-level consecrated foods are like the thanksgiving-offering and the peace-offerings and that which is similar to them, from those that are enumerated in the fifth chapter of Tractate Zevachim 48. And about this is it stated (Deuteronomy 12:17), “You may not eat in your gates, etc. and your promises” — the understanding of which is as if it stated, “You may not eat your promises.” And the masters of the tradition, may their memory be blessed, said (Makkot 17a), “The verse only comes with regard to one who eats a thanksgiving-offering or a peace-offering before the sprinkling of the bloods, [to teach] that he is [transgressing a negative commandment].”

It is from the roots of this commandment [that it is] to place into our hearts that it is always fitting for us to have benefit to our souls precede benefit to our bodies with everything in the world. Therefore it is not fitting that the body benefit from eating before the sprinkling of the bloods that comes for the atonement of the soul.

The laws of this commandment are also elucidated in Meilah and in [various] places in the Order Kodashim. (See Mishneh Torah, Laws of Sacrificial Procedure 11.)

And this prohibition is practiced in every place and at all times by males and females; as even one who consecrated his animal as lower-level consecrated foods today, and transgressed and ate a kazayit from it afterwards, is liable for lashes.