Do you think that G-d needs to eat? Does not the verse proclaim, "Should I hunger, I would not tell you, for the world, and all it contains, is Mine... Do I eat the flesh of bulls, or drink the blood of goats?" But it is not for My desire that you bring these offerings, [says G-d,] but for your own, as it is written (Leviticus 19:5), "For your own desire, you should offer it."
Talmud, Menachot 110a
