The first two kings, Saul and David, feature prominently in the first book of Samuel.
The First Book of Samuel is the ninth book in the Bible. It tells us about the prophet Samuel and the transition of Israel from the rule of Judges to that of Kings.
I Samuel 28:19
"Moreover the Lord will also deliver Israel with thee into the hand of the Philistines: and to morrow shalt thou and thy sons be with me: the Lord also shall deliver the host of Israel into the hand of the Philistines."
Samuel's words were true. Saul and his sons died the next day at the Battle of Gilboa