Leviticus 11:8

מבשרם לא תאכלו OF THEIR FLESH SHALL YE NOT EAT — I have here only a law about these animals mentioned here! Whence can I derive that the same applies to other unclean animals which have no sign of cleanness at all? You must admit that it is a conclusion a fortiori: How is it with these that have some signs of cleanness? They are forbidden! how much the more must this be so in the case of cattle which do not possess even one sign of cleanness! (Sifra, Shemini, Chapter 3 2). מבשרם OF THEIR FLESH [SHALL YE NOT EAT] — with respect to their flesh one is placed under a prohibition to eat, but not in respect to the bones, sinews, horns and claws (Sifra, Shemini, Chapter 4 8). ובנבלתם לא תגעו AND THEIR CARRION SHALL YE NOT TOUCH — One might think that Israelites (i. e. non-priests) are prohibited from touching a carcass at any time! It, however, states, (Leviticus 21:1) in reference to uncleanness in touching a corpse: “Speak unto the priests etc.” — priests are prohibited (from touching it) and Israelites in general are not prohibited. Well, you can draw a conclusion a fortiori from now (i. e. consequent upon what you have now stated): How is it in the case of uncleanness caused by a corpse, which is a stringent kind of uncleanness? The Torah prohibits it only to priests, but ordinary Israelites may touch a corpse. Surely in the case of uncleanness caused by a carcass which is less stringent this is all the more so! Then why does it state here: “[and their carrion] shall ye not touch”? — It means on a festival when every male Israelite was obliged to appear in the Sanctuary and should therefore be in a state of cleanness (Sifra, Shemini, Chapter 4 8-9; Rosh Hashanah 16b).

Of their flesh shall you not eat, and their carcass shall you not touch; they are unclean to you.

מִבְּשָׂרָם֙ לֹ֣א תֹאכֵ֔לוּ וּבְנִבְלָתָ֖ם לֹ֣א תִגָּ֑עוּ טְמֵאִ֥ים הֵ֖ם לָכֶֽם׃