Hebrews 9:15-17

15And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance. 16For where a testament is, there must also of necessity be the death of the testator. 17For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth.