At that time. That is, the time when the events recorded in ch. 7:32–34 would take place.
Bring out the bones. Some have suggested that the motive for such a desecration would be plunder, a search for treasures, ornaments, insignia, etc., commonly buried with kings. The context suggests that the motive would more likely be to heap malice and contempt upon the dead. Such a practice is in harmony with the gruesome customs of the Assyrians in dealing with the tombs of kings of conquered lands. The classes mentioned as having their bones so treated are the classes who had led in Judah’s backsliding.