Isaiah 1:11

To what purpose is the multitude of your sacrifices unto Me? saith the Lord, for the people were still observing the letter of the Law with great exactness, depending upon this outward fulfillment of God's command as sufficient to gain and retain His good will toward them. I am full of the burnt offerings of rams, He is surfeited with their dead worship, and the fat of fed beasts; and I delight not in the blood of bullocks, or of lambs, or of he-goats, such sacrifices indeed having been commanded by the Lord, but not in a lifeless, mechanical form of worship, for such hypocritical conduct is ever an abomination to the Lord.