Why did Joab flee to the ark and grab the horns?

Joab fled to the altar and grasped the horns as a plea for mercy after he killed Absalom, King David's son, during a battle. In ancient Israelite culture, the horns of the altar were seen as a symbol of sanctuary and protection, providing refuge for those seeking forgiveness. By grabbing the horns, Joab sought to invoke God's mercy and avoid punishment for his actions, reflecting his understanding of the sacredness of the altar.