In 1 Samuel 20:30, Saul angrily rebukes Jonathan for supporting David's kingship, contrasting with his own acknowledgment here.

In 1 Samuel 20:31, Saul vows to kill David to prevent his kingdom, opposite to his later admission that David's kingdom will be established.

In 1 Samuel 23:17, Jonathan tells David that Saul knows he will be king, which Saul himself now confirms.

In 1 Samuel 18:28, Saul knows the Lord is with David — this verse confirms the same recognition years later, now explicitly stated.

1 Samuel 28:17 has Samuel's spirit affirm the kingdom given to David — Saul's confession here matches that divine decree.