No satisfaction - Rather, ransom (see Exodus 21:30). The permission to demand pecuniary compensation for murders (expressly sanctioned by the Koran) undoubtedly mitigates, in practice, the system of private retaliation; but it does so by sacrificing the principle named in Numbers 35:12, Numbers 35:33.
Related Commentaries of Numbers 35:31
Numbers 35:31
31 Moreover ye shall take no satisfaction for the life of a murderer, which is guiltya of death: but he shall be surely put to death.