because a will does not take effect until the one who made it has died; it cannot be executed while he is still alive.
Berean Standard Bible (BSB)
For a will is in force where there has been death, for it is never in force while he who made it lives.
World English Bible (WEB)
For{G1063} a testament{G1242} is of force{G949} after{G1909} men are dead{G3498}: otherwise{G1893} it is of{G2480} no{G3379} strength{G2480}{(G5719)} at all{G3379} while{G3753} the testator{G1303}{(G5642)} liveth{G2198}{(G5719)}.
Strong's King James
(17) Because a covenant is enforced upon death since it doesn't have power while the one arranging it lives.
The F.O.G
The F.O.G Message
for a covenant over dead victims is stedfast, since it is no force at all when the covenant-victim liveth,
Young's Literal Translation