https://www.btstories.com/nathans-story/

Only God knew about David’s sin with Bathsheba. He sent the prophet Nathan, who stood before the king and told this story: “There were two men who lived in the same city. One was rich. He had a large herd of cattle and a large flock of sheep. The other was poor. He only had one small lamb, but she was like a daughter to him. The lamb grew up with his children as a pet. She ate from their bowls, drank from their cups, and even slept with them at night.