After Jeremiah prophesied the destruction of Judah, the people did not believe him. Judah was conquered and destroyed. Even after this, the people did not believe they would be safe in Babylon as Jeremiah prophesied. This is shocking. (See: [[rc://en/tw/dict/bible/kt/prophet]] and [[rc://en/tw/dict/bible/kt/believe]])
Jeremiah's burial of the stones was intended to be a symbolic action for the people. This was supposed to teach the people a lesson. (See: [[rc://en/ta/man/translate/figs-explicit]])