John Gills Exposition of the Bible Commentary - 1 Samuel 13:1
Saul reigned one year ,.... "Or the son of a year in his reigning" F19 בן שנה שאול במלכו "filius anni Saul in regnando ipsum", Montanus. ; various are the senses given of these words: some interpret them, Saul had a son of a year old when he began to reign, Ishbosheth, and who was forty years of age when his father died, 2 Samuel 2:10 , others, who understand the words of Saul himself, think there is an "ellipsis" or defect of the number, and that it may be supplied, that... read more
Matthew Henry's Complete Commentary - 1 Samuel 13:1-7
We are not told wherein it was that the people of Israel offended God, so as to forfeit his presence and turn his hand against them, as Samuel had threatened (1 Sam. 12:15); but doubtless they left God, else he would not have left them, as here it appears he did; for, I. Saul was very weak and impolitic, and did not order his affairs with discretion. Saul was the son of one year (so the first words are in the original), a phrase which we make to signify the date of his reign, but ordinarily it... read more