Genesis 9:5-6

5. And surely your blood of your lives will I require. In these words the Lord more explicitly declares that he does not forbid the use of blood out of regard to animals themselves, but because he accounts the life of men precious: and because the sole end of his law is, to promote the exercise of common humanity between them. I therefore think that Jerome, in rendering the particle אך (ach,) for, has done better than they who read it as an adversative disjunctive; ‘otherwise your blood will I require;’ yet literally it may best be thus translated, ‘And truly your blood.’ The whole context is (in my opinion) to be thus read, ‘And truly your blood, which is in your lives, or which is as your lives, that is which vivifies and quickens you, as it respects your body, will I require: from the hand of all animals will require it; from the hand of man, from the hand, I say, of man, his brother, will I require the life of man.’ The distinction by which the Jews constitute four kinds of homicide is frivolous; for I have explained the simple and genuine sense, namely, that God so highly estimates our life, that he will not suffer murder to go unavenged. And he inculcates this in so many words, in order that he may render the cruelty of those the more detestable, who lay violent hands upon their neighbors. And it is no common proof of God’s love towards us, that he undertakes the defense of our lives, and declares that he will be the avenger of our death. In saying that he will exact punishment from animals for the violated life of men, he gives us this as an example. For if, on behalf of man, he is angry with brute creatures who are hurried by a blind impulse to feed upon him; what, do we suppose, will become of the man who, unjustly, cruelly, and contrary to the sense of nature, falls upon his brother?