Midrasch zu Bereschit 32:33

4) I might think that the entire beast is permitted; it is, therefore, written (Bereshith 9:4): "Only the flesh with its life, its blood, you shall not eat" — ever min hechai (a limb torn from a living animal) is forbidden. (Bereshith 32:33): "Therefore, the children of Israel may not eat the thigh sinew (gid hanasheh)" — the gid hanasheh is forbidden. (Vayikra 7:3): "All fats (cheilev) of ox or sheep or goat you shall not eat" — cheilev is forbidden. (Vayikra 7:26): "And all blood you shall not eat" — blood is forbidden. I might think that they are permitted whether slaughtered (by shechitah) or not slaughtered, (but killed in some other way); it is, therefore, written (Devarim 27:7): "And you shall slaughter (by shechitah) … and you shall eat."