'Mourning' in the Bible

And when the mourning was past, David sent and fetched her to his house, and she became his wife, and bore him a son. But the thing that David had done was evil in the sight of Jehovah.

And Joab sent to Tekoah, and fetched thence a wise woman, and said to her, I pray thee, feign thyself to be a mourner, and put on mourning garments, I pray, and anoint not thyself with oil, but be as a woman that hath a long time mourned for the dead;

And the victory that day was turned into mourning for all the people; for the people heard say that day, The king is grieved for his son.