'Grain floor' in the Bible

behold, I will put a fleece of wool in the grain-floor. And if the dew is on the fleece only, and dry upon all the ground, then I shall know that You will save Israel by my hand, as You have said.

Then Gideon said, Because of this, when the Lord has given Zebah and Zalmunna into my hands, I will have you stretched on a bed of thorns of the waste land and on sharp stems, and have you crushed as grain is crushed on a grain-floor.