Charles Ellicott Commentary Isaiah 1:11

"What unto me is the multitude of your sacrifices? saith Jehovah: I have had enough 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 he-goats." — Isaiah 1:11 (ASV)

To what purpose is the multitude of your sacrifices ? ...—Isaiah carries on the great catena of prophetic utterances regarding the conditions of acceptable worship (1 Samuel 15:22; Psalms 40:6; Psalms 50:7–14; Psalms 51:16–17). In Hosea 6:6; Amos 5:21–24; Micah 6:6–8 we have the utterances of contemporary prophets, who may have exercised a direct influence on his teaching. The description points primarily, perhaps, to the reign of Uzziah, but may include that of Hezekiah. The account of the sacrifices agrees with 2 Chronicles 29:21–29.

Saith the Lord ...—Here, as in Isaiah 1:18; Isaiah 33:10; Isaiah 41:21; Isaiah 66:9, the prophet uses the future instead of the familiar past tense. This is what Jehovah will say, once and for ever.