Deuteronomy 15:19-22

“You shall consecrate to the LORD your God all the firstborn males that are born of your herd and of your flock; you shall not work with the firstborn of your herd, nor shear the firstborn of your flock. You and your household shall eat it every year before the LORD your God in the place which the LORD chooses. But if it has any defect, such as lameness or blindness, or any serious defect, you shall not sacrifice it to the LORD your God. You shall eat it within your gates; the unclean and the clean alike may eat it, as a gazelle or a deer.