Jeremiah 7:21

(Verse 21) Thus says the Lord of hosts, the God of Israel: Add your burnt offerings to your sacrifices, and eat the flesh. When He condemns the temple, He consequently condemns the sacrifices as well; and He indirectly accuses them because they offer victims not out of reverence for Him, but out of a desire for feasts.

You are blessed who are delivered from the curse. Christ, the Son of God, by his coming has confirmed and completed the law but has taken away the additional precepts, although not all of them, yet at least the more grievous ones. He confirmed the former and abolished the latter, and he has again set the free will of humankind at liberty. He does not subject them to the penalty of a temporal death but gives laws to them according to another constitution. For this reason, he says, "If anyone will come after me, let him come." And again, "Will you also go away?" And besides, before his coming he refused the sacrifices of the people, while they frequently offered them, when they sinned against him and thought he was to be appeased by sacrifices but not by repentance.

It is made clear also from this that the obsolete prescriptions of the law had been imposed because of Israel's limitations. Since they had learned in Egypt how to sacrifice to idols, he wanted to separate them from those practices—in all the prophets he rejects them, remember—yet out of consideration for their limitations he utters this remark, "Eat flesh," that is, Although I reject the sacrifices, I shall not oppose your partaking of flesh. After all, he declares in the law that those wishing to partake of flesh in their own cities and towns should "perform the sacrifice, but pour out the blood on the ground and then partake of the sacrifice," not as though they were offering it as a sacrifice but as ordinary flesh, as part of the prohibition imposed on performing sacred rites outside the designated place.