Genesis 9:5

“And surely your blood of your lives will I require, etc.] Or “for surely your blood”, etc. f483; and so is a reason of the preceding law, to teach men not to shed human blood; or though, “surely your blood”, as Jarchi and Aben Ezra; though God had given them liberty to slay the creatures, and shed their blood, and eat them, yet he did not allow them to shed their own blood, or the blood of their fellow creatures; should they do this, he would surely make inquisition, and punish them for it: at the hand of every beast will I require it; should a beast kill a man, or be the instrument of shedding his blood, it should be slain for it; not by means of another beast, God so ordering it, as Aben…”

“surely your blood of your lives will I require--The fourth part establishes a new power for protecting life--the institution of the civil magistrate (Rom 13:4), armed with public and official authority to repress the commission of violence and crime. Such a power had not previously existed in patriarchal society.”

“- The Blessing of Noah 2. מורא môrā', “fear, reverence, awful deed.” חת chat, “dread, breaking of the courage.” Noah is saved from the deluge. His life is twice given to him by God. He had found grace in the sight of the Lord, and now he and his family have been graciously accepted when they approached the Lord with burnt-offerings. In him, therefore, the race of man is to be begun anew. Accordingly, as at the beginning, the Lord proceeds to bless him. First. The grant of increase is the same as at first, but expressed in ampler terms. Second. Dominion over the other animals is renewed. But some reluctance on their part to yield obedience is intimated. “The fear and dread of you.” These…”

“9:5-6 Violence, including murder, was a major factor in bringing about God’s judgment of the flood (4:8; 6:11, 13). At this new beginning for humans, God affirmed the sanctity of human life and established a system of retributive justice for the taking of human life (see also Ps 9:12; “Retribution” Theme Note). The function of law is to restrain human wickedness and preserve moral order. This law was further developed in the law of Moses (Exod 21:12-14; Lev 24:17-22; Num 35:16-34; Deut 17:6-7; 19:15).”