'Lord of Hosts' in the Bible

And Elisha said, As the LORD of hosts liveth, before whom I stand, surely, were it not that I regard the presence of Jehoshaphat the king of Judah, I would not look toward thee, nor see thee.

For a remnant will go forth from Jerusalem, and [a band of] survivors from Mount Zion. The zeal of the Lord of hosts shall perform this.