Haggai 2:8

"The silver is mine, and the gold is mine, saith Jehovah of hosts."

This is apparently mentioned to indicate that:

"All nations with their wealth come (into Christ's kingdom) and the Gentiles shall bring their treasures, their powers, whatever they most prize, to the service of God ... All that, is here called metaphorically, coming with treasures to the Temple."[10]

This passage is "unmistakably Messianic. There could hardly be a more vivid picture of the covenant promise."[11] What is clearly prophesied here is that the "true riches of God (typified here as the silver and the gold) will make the house of God (the church) outshine the glory of Solomon's temple."[12]