לָמָּה־לִּ֤י רֹב־זִבְחֵיכֶם֙ יֹאמַ֣ר יְהוָ֔ה שָׂבַ֛עְתִּי עֹל֥וֹת אֵילִ֖ים וְחֵ֣לֶב מְרִיאִ֑ים וְדַ֨ם פָּרִ֧ים וּכְבָשִׂ֛ים וְעַתּוּדִ֖ים לֹ֥א חָפָֽצְתִּי׃
To what purpose is the multitude of your sacrifices unto Me? Saith 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 he-goats.
Rashi on Isaiah
I am sated with the burnt-offerings of rams This is similar to: “Lest he have too much of you and hate you,” (Proverbs 25:18).
Ibn Ezra on Isaiah
To what purpose, etc. Why should I leave you longer in the land ? Is it for the sake of the multitude of your burnt offerings ? I am full, etc. An anthropomorphism ; in reality, He does not want anything; comp. If I were hungry, I would not tell thee, etc. (Ps. 1. 12 ff).
Chomat Anakh on Isaiah
Why do I need your many sacrifices: Because the primary point of a sacrifice is to repent and if you remain rebellious the sacrifice does not help.