Midrash su Levitico 7:26

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."

11) (Vayikra 7:26) ("And all blood you shall not eat, in all of your habitations, of bird and of beast.") "All blood you shall not eat": I might think that also included is the blood of bipeds (men), the blood of reptiles, the blood of eggs, the blood of grasshoppers, and the blood of fish. It is, therefore, written "of bird and of beast." Just as bird and beast are characterized by being subject to minor uncleanliness (that of food) and to major uncleanliness (that of neveilah, which confers tumah through carrying), and by (states of) prohibition (before shechitah) and by (states of) permission (after shechitah), and by being of the class of meat, (so all thus characterized are included in the stricture against eating blood.) This excludes the blood of bipeds (men), which are not subject to minor uncleanliness (If one touches a dead body, the clothes upon him become tamei), the blood of reptiles, which are not subject to major uncleanliness, (not causing tumah through carrying), the blood of eggs, which are not of the class of meat, and the blood of grasshoppers and of fish, which are always in a state of permission. "of bird and of beast": (If only "bird" were stated, I would say:) Just as a bird, which is not subject to kilaim (the law against admixture of materials), so, a beast which is not subject to kilaim (comes under the stricture of forbidden blood, [to exclude sheep, which are subject to kilaim by way of their wool]. It is, therefore, written "and of beast" (to include all beasts). Or (if only "beast" were stated, I would say:) Just as a beast, which is not subject to the law against taking the mother with the young (Devarim 22:6), so a bird which is not subject to that law (comes under the stricture of forbidden blood, but not a clean bird). It is, therefore, written "and of bird."