'Threshing floors' in the Bible

Then they told David, saying, “Behold, the Philistines are fighting against Keilah and are plundering (robbing) the threshing floors [of the grain].”

Then the iron, the clay, the bronze, the silver, and the gold were crushed together and became like the chaff from the summer threshing floors; and the wind carried them away so that not a trace of them could be found. And the stone that struck the statue became a great mountain and filled the whole earth.