Haggai 1:9

The Israelites had looked for much blessing from the Lord, but they had found very little. When they brought their grain home, the Lord blew it away. Apparently their grain was so light and small that much of it blew away with the chaff when they threshed it. The reason was clear. They had neglected the temple and had given all their time and energy to providing for themselves by building their own houses.

There are six occurrences of the phrase "declares the LORD of hosts" in Haggai (Haggai 1:9; Haggai 2:4; Haggai 2:8-9; Haggai 2:23 [twice]) and six occurrences of the shorter phrase "declares the LORD" (Haggai 1:13; Haggai 2:4 [twice], 14, 17, 23). This is unusual for a book as short as Haggai. Obviously the writer wanted to emphasize the divine origin of his message to the people. [Note: Ibid., pp. 44-45, wrote an extended note on the name "the Lord of Hosts."]