Ish-bosheth, Saul’s son, was forty years old when he became king over Israel, and he reigned for two years. But the house of Judah followed David.

David was thirty years old when he became king, and he reigned forty years.

which Barzillai was a very aged man, even four score year old, and had provided the king of sustenance while he lay at Mahanaim: for he was a man of very great substance.

I am this day four score year old: and therefore can not discern savoury from unsavoury, neither hath thy servant pleasure in that he eateth or drinketh: nor yet delectation in the songs of men or women. It is no need that thy servant be a burden unto my lord the king: