'Cleaning' in the Bible

And Rechab and Baanah, the sons of Rimmon the Beerothite, went out and came to the house of Ish-bosheth in the heat of the day, when he was resting in the middle of the day. Now the woman who kept the door was cleaning grain, and sleep overcame her.

And Araunah said to David, Let my lord the king take whatever seems right to him, and make an offering of it: see, here are the oxen for the burned offering, and the grain-cleaning instruments and the ox-yokes for wood: