Hebrews 9:15-18

15Therefore Christ is the mediator of a new covenant, so that those who are called may receive the promised eternal inheritance, now that He has died to redeem them from the transgressions committed under the first covenant.

16In the case of a will,1 it is necessary to establish the death of the one who made it, 17because a will does not take effect until the one who made it has died; it cannot be executed while he is still alive.

18That is why even the first covenant was not put into effect without blood.