Hebrews 9:14-17
English Standard Version
15Therefore he is the mediator of a new covenant, so that those who are called may receive the promised eternal inheritance, since a death has occurred that redeems them from the transgressions committed under the first covenant.
16For where a will is involved, the death of the one who made it must be established.
17For a will takes effect only at death, since it is not in force as long as the one who made it is alive.