Beth-marcaboth - The house or city of chariots. Probably a place where their war-chariots and cavalry were laid up.

And Ziklag,.... Another of the cities of Judah; see Gill on Joshua 15:31,
and Bethmarcaboth, and Hazarsusah; or Hazarsusim, as in 1-Chronicles 4:31; the one signifies a chariot house, and the other a court or stable for horses, which made Bochart conjecture (a), that they were places where Solomon kept his chariots and horses; but it should be observed that these were the names by which these places went in the times of the old Canaanites; and seem to me rather where some of their kings had their horses and chariots; or rather where there were temples dedicated to the horses and chariots of the sun; see 2-Kings 23:11.
(a) Hierozoic. l. 2. c. 9. col. 158.