'Mourning' in the Bible

When the mourning [was] over, David sent and brought her to his household, and she became his wife and bore him a son. But the thing which David had done [was] evil in the eyes of Yahweh.

So Joab sent to Tekoa and took from there a wise woman, and he said to her, "Please pretend to mourn and put on garments of mourning. You should not anoint yourself [with] oil, and you must act like this woman who has been mourning over the dead for {a long time}.

so the victory turned to mourning on that day for all the army, because they had heard that day, "The king is grieving over his son."