Hebrews 9:16

In the case of a will, it is necessary to establish the death of the one who made it,

Note Greek diathēkē is also translated as covenant throughout this chapter.

For where a testament is, there must also of necessity be the death of the testator.

For where a last will and testament is, there must of necessity be the death of him who made it.

For where a testament is, there must of necessity be the death of him that made it.