'Lord of Hosts' in the Bible

Therefore as truly as I live, sayeth the LORD of Hosts the God of Israel, Moab shall be as Sodom, and Ammon as Gomorrah: even dry thorn hedges, salt pits and perpetual wilderness. The residue of my folk shall spoil them, the remnant of my people shall have them in possession.

This shall happen unto them for their pride, because they have dealt so shamefully with the LORD of Hosts' people, and magnified themselves above them.