John Gill Commentary 1 Kings 5:13

"And king Solomon raised a levy out of all Israel; and the levy was thirty thousand men." — 1 Kings 5:13 (ASV)

And King Solomon raised a levy out of all Israel
Not of money, but of men, as follows:

and the levy was thirty thousand men ;
for what purpose, and how they were employed, (1 Kings 5:14) shows.