The gold of Ophir was accounted the best and purest gold; of which see Job_22:24 28:16 Isa_13:12; by which it appears that those hundred thousand talents mentioned before, 1Ch_22:14, were a coarser and impurer sort of gold.
To overlay the walls of the houses withal; the walls of the temple with gold, and of the rooms adjoining to it with silver beaten out into plates, and put upon the other materials here and there as it was thought fit.