This story adapts Isaiah’s Song of the Vineyard (Isaiah 5:1–7) to describe the rejection of Jesus by Israel’s leaders. In Isaiah’s story, the vineyard owner represents God, and the vineyard represents Israel, which failed to produce good fruit and would be judged.
Jesus added new characters to the story. The tenant farmers represent Israel’s unrighteous leaders, the servants represent the Old Testament prophets who were repeatedly rejected, and the son represents Jesus. God would judge Israel’s leaders for rejecting and killing his Son.