Touching a Shepherd's Heart, II Samuel 12, OT S1:E179

Nathan tells David of a rich man who stole his poor neighbor's only lamb, to host a party for a traveler. Enraged by such cruelty, David ordered the man to pay four-fold for his sin. David was the man. The story was a parable telling of David's sin with Bathsheba. Cut to the heart, David repents. Forgiven, he will suffer for this sin, as will the entire nation in time.