'Floor' in the Bible

The servants waited until they became worried and saw that he had still not opened the doors of the upstairs room. So they took the key and opened the doors—and there was their lord lying dead on the floor!

Behold, I will put a fleece of wool in the floor; and if the dew be on the fleece only, and it be dry upon all the earth beside, then shall I know that thou wilt save Israel by mine hand, as thou hast 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.