Moses
Deuteronomy 12:23ESV·traditional attribution

Only be sure that you do not eat the blood, for the blood is the life, and you shall not eat the life with the flesh.

John Calvin Reformed @genevareformer

23. Only be Lat., “Roberare.” Margin, A. V., “Heb., Be strong.” sure that thou eat not. It is not without cause that he earnestly exhorts them to inflexible firmness, because it was both a matter trifling in appearance, and its observation troublesome, whilst it was easy to decline from it on account of the universal example of the Gentiles.

Matthew Henry Presbyterian @wholebiblehenry

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...

Commenting on Deuteronomy 12:5-32

John Gill Reformed Baptist @doctorgill

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 Lev 17:11, and thou mayest not eat the life with the flesh: by which it seems that the meaning of the law...