Leviticus 22:23-25

23You may use a bull or a sheep with a deformity or one that is stunted in growth as a freewill offering. However, it will not be accepted for a vow.

24Never bring the Lord an animal that has bruised, crushed, torn out, or cut out testicles. Never do any of these things to an animal in your land.

25Never bring any kind of castrated animal received from a foreigner as a food offering for your God. A castrated animal will not be accepted on your behalf because castration is a physical defect.”