'Mourning' in the Bible

When the time of mourning was over, David sent and brought her to his house and she became his wife; then she bore him a son. But the thing that David had done was evil in the sight of the Lord.

So Joab sent to Tekoa and brought a wise woman from there and said to her, “Please pretend to be a mourner, and put on mourning garments now, and do not anoint yourself with oil, but be like a woman who has been mourning for the dead many days;

The victory that day was turned to mourning for all the people, for the people heard it said that day, “The king is grieved for his son.”