Commento su Deuteronomio 15:23

רק את דמו לא תאכל ONLY THOU SHALT NOT EAT THE BLOOD THEREOF — This prohibition appears to be redundant, since the blood of no animal may be eaten, but it is mentioned, in order that you should not think: since it (the blemished firstborn animal) is something that in every respect is permitted originally it belonged to a forbidden class of animals — for, you see, it was holy and yet it may be slaughtered outside the Temple, and may be eaten without redemption — and consequently you might think that its blood is also permitted, Scripture therefore states, “However thou shalt not eat its blood”.

רק את דמו לא תאכל, “only its blood you may not eat.” The reason the Torah repeats this prohibition which was all inclusive anyway, is so that the priest should not think that seeing the whole subject is one dealing with something that had been originally forbidden [while the animal had been unblemished, Ed.]. becoming permitted, that this change in status included also the consumption of blood (compare Rashi).