9:16 {11} For where a testament [is], there must also of necessity be the death of the testator.
(11) A reason why the testament must be established by the death of the Mediator, because this testament has the condition of a testament or gift, which is made effective by death, and therefore that it might be effective, it must be that he that made the Testament, should die.
9:16 For where a testament [is]. An inheritance has just been spoken of (Heb 9:15). That suggests a last will and testament, one meaning of the Greek word diatheekee. See PNT Heb 9:15.
There must also of necessity be the death of the testator. A testament has no force until the testator is dead.
9:16 I say by means of death; for where such a covenant is, there must be the death of him by whom it is confirmed - Seeing it is by his death that the benefits of it are purchased. It seems beneath the dignity of the apostle to play upon the ambiguity of the Greek word, as the common translation supposes him to do.
9:15-22 The solemn transactions between God and man, are sometimes called a covenant, here a testament, which is a willing deed of a person, bestowing legacies on such persons as are described, and it only takes effect upon his death. Thus Christ died, not only to obtain the blessings of salvation for us, but to give power to the disposal of them. All, by sin, were become guilty before God, had forfeited every thing that is good; but God, willing to show the greatness of his mercy, proclaimed a covenant of grace. Nothing could be clean to a sinner, not even his religious duties; except as his guilt was done away by the death of a sacrifice, of value sufficient for that end, and unless he continually depended upon it. May we ascribe all real good works to the same all-procuring cause, and offer our spiritual sacrifices as sprinkled with Christ's blood, and so purified from their defilement.