Sefer HaChinuch ספר החינוך

To not offer a sacrifice of [an animal] with a temporary blemish: That we have been prevented from offering a beast that has a blemish in it, and even if it is a temporary blemish. And about this is it stated (Deuteronomy 17:1), “You shall not slaughter to the Lord, your God, an ox or a sheep that has a blemish on it, etc.” And it is elucidated in Sifrei Devarim 147 that the verse is speaking about a temporary blemish.

I have written from the roots of the commandment in Emor el HaKohanim in commandments 277 and 287 (286). And there is also a hint to this in the negative commandment (Sefer HaChinukh 275).

The laws of the commandment are, for example, the differences that they, may their memory be blessed, said (Bekhorot 37b) that are in a beast between a temporary blemish and a permanent blemish: As any beast that has a permanent blemish in it is redeemed — and it is a commandment to redeem it — as we have elucidated in the Order of Reeh Anokhi on the commandment of redeeming consecrated [animals] that had a blemish develop on them (Sefer HaChinukh 441); but if it is a temporary blemish it is not offered and not redeemed, but rather we wait on it until it heals or until it becomes defiled. And about the matter of permanent blemishes and their number, I have already written some of this, as is my custom, in the Order of Emor el HaKohanim in Commandment 287 (Sefer HaChinukh 286). And behold, I will remind you what a temporary blemish is — for example, a wet boil or a growth that is not Egyptian, and so [too,] water dripping from the eye that is not a permanent sickness, and similar to these. [These] and the rest of the laws of the commandment are elucidated in Tractate Bekhorot (Chapter 6).

And this prohibition is practiced at the time of the [Temple], as it was then in our hands to offer sacrifices. And priests and also Israelites, males and females, are included in this prohibition of slaughtering. As since the slaughter of the sacrifices is fit with foreigners (non-priests), so too can we say that they transgress it, if they do it not like the law.