9 And Joab gave up the sum of the number of the people to the king: And there were in Israel eight hundred thousand valiant men that drew the sword; and the men of Judah were five hundred thousand men.
2 Samuel 24:9 Cross References - TKJU
Numbers 1:44-46
44 These are those that were numbered, which Moses and Aaron numbered, and the princes of Israel, being twelve men: Each one was for the house of his fathers.
45 So were all those that were numbered of the children of Israel, by the house of their fathers, from twenty years old and upward, all that were able to go forth to war in Israel;
46 even all those that were numbered were six hundred thousand and three thousand and five hundred and fifty.
1 Chronicles 21:5-6
5 And Joab gave the sum of the number of the people to David. And all they of Israel were a thousand thousand and a hundred thousand men that drew sword: And Judah was four hundred three score and ten thousand men that drew sword.
6 But Levi and Benjamin counted he not among them: For the king's word was abominable to Joab.
1 Chronicles 27:23-24
23 But David took not the number of them from twenty years old and under: Because the LORD had said he would increase Israel like to the stars of heaven.
24 Joab the son of Zeruiah began to number, but he finished not, because there fell wrath for it against Israel; neither was the number put in the account of the chronicles of king David.