'Mourning' in the Bible

The king composed this mourning song for Abner: "Should Abner's death be like a fool's?

When Uriah's wife heard about the death of her husband Uriah, she went into mourning for the head of her household.

And when the mourning was past, David sent and fetched her to his house, and she became his wife, and bare him a son. But the thing that David had done displeased the LORD.

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

It was reported to Joab, “The king is weeping. He’s mourning over Absalom.”

And the victory that day was turned into mourning unto all the people: for the people heard say that day how the king was grieved for his son.