'Threshing floor' in the Bible

Now, therefore, is not, Boaz, of our kindred, with whose maidens thou hast been? Lo! he is winnowing the barley threshing-floor, to-night!

Thou wilt, therefore, bathe thee, and anoint thee, and put thine apparel upon thee, and go down to the threshing-floor, - do not make thyself known to the man, until he have done eating and drinking.

So she went down to the threshing-floor, - and did according to all that her mother-in-law had commanded her.

So she lay at his feet, until the morning, and rose up before one could know his neighbour. And he said - Do not let it be known that a woman came into the threshing-floor.