And the whole valley of the dead bodies, and of the ashes, and all the fields unto the torrent Kidron, unto the corner of the horse-gate toward the east, shall be holy unto Jehovah: it shall not be plucked up, nor overthrown any more for ever.
Jeremiah 31:38 Behold, the days come, saith Jehovah, that the city shall be built to Jehovah, from the tower of Hananeel unto the corner-gate.
Jeremiah 31:39 And the measuring line shall yet go forth before it unto the hill Gareb, and shall turn toward Goath.
Jeremiah 31:40 And the whole valley of the dead bodies, and of the ashes, and all the fields unto the torrent Kidron, unto the corner of the horse-gate toward the east, shall be holy unto Jehovah: it shall not be plucked up, nor overthrown any more for ever.
The verse centers on "whole", "valley", "dead", "bodies", "ashes", "fields", "torrent", and "kidron". It is saying that the verse draws attention to "whole" and "valley", so its meaning should be read from those terms before moving to application.
The prior verse says "And the measuring line shall yet go...", giving immediate footing for "whole" and "valley". In Jeremiah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "whole" and "valley" with trust shaped by these words, not by a vague optimism outside the passage.