David said to Solomon his son, Be strong and of good courage, and do it: don't be afraid, nor be dismayed; for Yahweh God, even my God, is with you; he will not fail you, nor forsake you, until all the work for the service of the house of Yahweh is finished.
"2 Samuel 20:24 indicates that David used forced (slave) labor; that passage does not say who composed the labor gangs";[1] and, although David might not have forced Israelites into his forced labor gangs, the enslaved Canaanites were certainly used; and Solomon quickly extended them to include Israelites also.  There is no way that the evil, secular and political kingdom of Israel could have been the kingdom of heaven.  Of course, the multitudes who were living off the sweat of other peoples' faces liked doing so; and no doubt many thought it was wonderful.  (See further comment on this in our Introduction to  1 Kings 4.)