What mistake did Jonathan make from the bible?

In The Bible, Jonathan, the son of King Saul, made the mistake of siding with David, whom his father viewed as a rival for the throne. Despite his deep friendship with David and recognizing God's favor upon him, Jonathan's loyalty to David put him at odds with Saul, leading to tension and conflict within his family. Ultimately, his failure to fully confront Saul about his jealousy and intentions toward David contributed to the tragic circumstances that unfolded. Jonathan's loyalty, while noble, placed him in a precarious position between his father and his friend.