1 Chronicles 27:1, 23-24

Now the children of Israel after their number, to wit, the heads of fathers’ houses and the captains of thousands and of hundreds, and their officers that served the king, in any matter of the courses which came in and went out month by month throughout all the months of the year—of every course were twenty and four thousand.

But David took not the number of them from twenty years old and under, because Jehovah had said he would increase Israel like to the stars of heaven. Joab the son of Zeruiah began to number, but finished not; and there came wrath for this upon Israel; neither was the number put into the account in the chronicles of king David.