'Threshing sledges' in the Bible

and, the people that were therein, brought he forth, and cut with the saw and with threshing sledges of iron and with axes, thus also, used David to do unto all the cities of the son of Ammon, - and David and all the people returned to Jerusalem.

And Ornan said to David, Take it to thee, and let my lord the king do that which is good in his sight: see, I give the oxen for the burnt-offering, and the threshing-sledges for wood, and the wheat for the oblation; I give it all.