Hebrews chapter 9 :16 - 18 for where a testament is, there must also of necessity be the death of the testator. for a testament is a force after men are dead: otherwise it is of no strength at all while the testator liveth. whereupon neither the first testament was dedicated without blood . Christ's covenant did not go into effect until he died for it is blood that ratified a covenant.
Gal. 3:15 reveals though it be but a man's covenant yet if it be confirmed, no man disannulleth or addeth thereto.
It's saying even men don't let you add or take away from a covenant once it is ratified by the blood of the testator. Interring, much less would God do so therefore Sunday came a couple hundred years too late.