Deuteronomy 17:1
You shall not sacrifice to the LORD your God an ox or a sheep with any defect or serious flaw, for that is detestable to the LORD your God.
What it says
Israel must not sacrifice an ox or sheep with any defect or serious flaw to the LORD, because such an offering is detestable to him.
What it is doing
It establishes that covenant worship must not be marked by damaged offerings.
In context
1You shall not sacrifice to the LORD your God an ox or a sheep with any defect or serious flaw, for that is detestable to the LORD your God.