Jeremiah 6:26

Wallow thyself in ashes. — So in Jeremiah 25:34; Ezekiel 27:30. The ordinary sign of mourning was to sprinkle dust or ashes on the head (2 Samuel 1:2; 2 Samuel 13:19; Joshua 7:6). This, as in Jeremiah 25:34; Micah 1:10; Job 2:8, indicated more utter wretchedness and prostration. The English verb belongs to the class of those which were once used reflexively, and have now come to be intransitive. “Endeavour” supplies another example.