Charles Spurgeon Commentary Haggai 2:6-9

"For thus saith Jehovah of hosts: Yet once, it is a little while, and I will shake the heavens, and the earth, and the sea, and the dry land; and I will shake all nations; and the precious things of all nations shall come; and I will fill this house with glory, saith Jehovah of hosts. The silver is mine, and the gold is mine, saith Jehovah of hosts. The latter glory of this house shall be greater than the former, saith Jehovah of hosts; and in this place will I give peace, saith Jehovah of hosts." — Haggai 2:6-9 (ASV)

And I will shake the heavens, and the earth, and the sea, and the dry land; And I will shake all nations, and the desire of all nations shall come: and I will fill this house with glory, saith the LORD of hosts. The silver is mine, and the gold is mine, saith the LORD of hosts. The glory of this latter house shall be greater than of the former, saith the LORD of hosts: and in this place will I give peace, saith the LORD of hosts.

Clearly encouraging them to proceed with their work.