But now your kingdom shall not continue: the LORD has sought him a man after his own heart, and the LORD has commanded him to be ruler over his people, because you have not kept that which the LORD commanded you.
All Commentaries on 1 Samuel 13:14 Go To 1 Samuel 13
Augustine of Hippo
AD 430
In the same vein, take the words Samuel said to Saul.… These words are not to be taken to mean that God had intended for Saul himself to reign forever and subsequently had decided otherwise on account of Saul’s sins (for God knew Saul was going to sin). They mean merely that God had planned for him to have such a kingdom as would typify an everlasting kingdom. Hence the added precision: “But your kingdom shall not continue.”
The kingdom which Saul’s kingdom symbolized has continued and will continue—but not for Saul; for neither was he personally destined to rule forever, nor was even his progeny after him (at least in the sense of his blood successors following one after another) to make good the pledge “forever.”