In Isaiah's song of the vineyard, what is the vineyard of the LORD of Hosts?

Answer: The house of Israel

"The vineyard of the LORD of Hosts is the house of Israel." He looked for justice and righteousness but found bloodshed.

“For the vineyard of the LORD of Hosts is the house of Israel, and the men of Judah are the plant of His delight. He looked for justice, but saw bloodshed; for righteousness, but heard a cry of distress.”— Isaiah 5:7 (BSB)