'Grain floor' in the Bible

And when they came to Nacon's grain-floor, Uzzah put his hand on the ark of God to keep it safe in its place, for the oxen were out of control.

And when the hand of the angel was stretched out in the direction of Jerusalem, for its destruction, the Lord had regret for the evil, and said to the angel who was sending destruction on the people, It is enough; do no more. And the angel of the Lord was by the grain-floor of Araunah the Jebusite.

And that day Gad came to David and said to him, Go up, and put up an altar to the Lord on the grain-floor of Araunah the Jebusite.

And Araunah said, Why has my lord the king come to his servant? And David said, To give you a price for your grain-floor, so that I may put up an altar to the Lord, and the disease may be stopped among the people.

And the king said to Araunah, No, but I will give you a price for it; I will not give to the Lord my God burned offerings for which I have given nothing. So David got the grain-floor and the oxen for fifty shekels of silver.