1 Kings 2:11

And the days that David reigned over Israel were forty years ,.... So says Eupolemus F19 Apud Euseb. Praepar. Evangel. l. 9. c. 30. , an Heathen writer, which are thus reckoned:

seven years reigned he in Hebron ; the six months over are omitted, 2 Samuel 5:5 ; this part of his reign was over Judah only:

and thirty three years reigned he in Jerusalem ; over the twelve tribes, in all forty, which round number is only given; though in fact he reigned six months more.