2 Samuel 3:36

And all the people took notice of it, and it pleased them: as whatsoever the king did pleased all the people.

David's magnanimous public recognition of Abner, though Abner had been his bitter enemy, won him the confidence and admiration of all Israel. The pleasure of all the people in everything the king did that day proves they understood that the slaying of Abner was not the king's act. Their universal approval showed that his generous honoring of a fallen foe had cleared him before the nation.