2 Chronicles 17:19

These waited on the king
Not this vast number of men at one time, but in course, as David's military men waited on him, ( 1 Chronicles 27:1-15 ) or each of these captains, with a proper number of men under them detached from the body; and they were all ready to obey the king's orders whenever he should have occasion for them:

besides those whom the king put into the fenced cities throughout
Judah;
and all together, the militia of the kingdom was very numerous and formidable.