'Mourning' in the Bible

When the time of mourning ended, David had her brought to his house. She became his wife and bore him a son. However, the Lord considered what David had done to be evil.

So Joab sent someone to Tekoa to bring a clever woman from there. He told her, “Pretend to be in mourning: dress in mourning clothes and don’t put on any oil. Act like a woman who has been mourning for the dead for a long time.

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

That day’s victory was turned into mourning for all the troops because on that day the troops heard, “The king is grieving over his son.”