'Wheat' in the Bible

Ornan turned around and saw the angel. While his four sons with him ran away to hide, Ornan continued to thresh wheat.

But Ornan replied to David, "Take it! Let your majesty the king do whatever seems like a good idea to him. Look here! I'm giving the oxen for burnt offerings, the threshing machinery for the wood, and the wheat for a grain offering. I'm giving all of it."