Albert Barnes Commentary 1 Chronicles 29:4

"even three thousand talents of gold, of the gold of Ophir, and seven thousand talents of refined silver, wherewith to overlay the walls of the houses;" — 1 Chronicles 29:4 (ASV)

The numbers here have also suffered to some extent from the carelessness of copyists (compare the note on 1 Chronicles 22:14). The amount of silver is not improbable, since its value would not exceed three million of our money; but as the gold would probably exceed thirty million in value, we may suspect an error in the words “three thousand.”