Halakhah zu Wajikra 22:20

That we not consecrate [animals] with blemishes for the altar: That we not consecrate [animals] with blemishes, to sacrifice, them for the altar. And even though he did not sacrifice them, there is a negative commandment for the consecration alone. And about the consecration alone is it stated (Leviticus 22:20), "All that has a blemish in it, you shall not offer" - on account of you shall not consecrate (Temurah 6a).