1 Samuel 13:1 - Albert Barnes' Notes on the Bible

The text of this verse, omitted by the Septuagint, is held to be corrupt, and the numerals denoting Saul’s age at his accession as well as the duration of his reign, are thought to be omitted or faulty. Saul may have been about 30 at his accession, and have reigned some 32 years, since we know that his grandson Mephibosheth was five years old at Saul’s death 2 Samuel 4:4; and 32 added to the seven and a half years between the death of Saul and that of Ishbosheth, makes up the 40 years assigned to Saul’s dynasty in Acts 13:21. Neither is there any clue to the interval of time between the events recorded in the preceding chapter, and those which follow in this and succeeding chapters. But the appearance of Jonathan as a warrior 1 Samuel 13:2 compared with the mention of Saul as “a young man” 1 Samuel 9:2, implies an interval of not less than ten or fifteen years, perhaps more. The object of the historian is to prepare the way for the history of David’s reign. He therefore passes at once to that incident in Saul’s reign, which led to his rejection by God, as recorded in 1 Samuel 13:13-14.