But now your kingdom shall not continue: Yahweh has sought him a man after his own heart, and Yahweh has appointed him to be prince over his people, because you have not kept that which Yahweh commanded you.
So Jonathan was out wiping out the Philistines and Saul was around blowing the trumpet, and taking the glory and announcing that he had smitten the Philistines so that the Israelites heard that Saul had smitten the Philistines with a great slaughter.