To what purpose is the multitude of your sacrifices unto me?
says the LORD:
I am full of the burnt offerings of rams, and the fat of fed beasts; and I delight not in the blood of bullocks, or of lambs, or of male goats.
All Commentaries on Isaiah 1:11 Go To Isaiah 1
Ambrose of Milan
AD 397
By saying that he does not delight in the sacrifices of the people, God is saying this: I abound in my own [sacrifice], I do not seek yours, I do not desire whole burnt offerings of rams and the fat of lambs and the blood of bulls and of goats. And do not come so into my sight.