John Gills Exposition of the Bible Commentary - Deuteronomy 12:23
Only be sure that thou eat not the blood ,.... This is repeated again, that they might be careful to observe the law concerning that: for the blood is the life : which is the reason given for the prohibition of it; see Gill on Leviticus 17:11 , and thou mayest not eat the life with the flesh : by which it seems that the meaning of the law was, that the blood might not be eaten in or with the flesh, but to be let out of it, or the fish not to be eaten raw, but dressed; for there... read more
Matthew Henry's Complete Commentary - Deuteronomy 12:5-32
There is not any one particular precept (as I remember) in all the law of Moses so largely pressed and inculcated as this, by which they are all tied to bring their sacrifices to that one altar which was set up in the court of the tabernacle, and there to perform all the rituals of their religion; for, as to moral services, then, no doubt, as now, men might pray every where, as they did in their synagogues. The command to do this, and the prohibition of the contrary, are here repeated again... read more