'Grain' in the Bible

It will be like when the harvester gathers the wheat, and his arm reaps the grain. Yes, it will be like when one gleans grain in the valley of Rephaim.

You are my threshing, and the grain of my floor!" That which I have heard from Yahweh of Armies, the God of Israel, I have declared to you.

until I come and take you away to a land like your own land, a land of grain and new wine, a land of bread and vineyards.

Yahweh has sworn by his right hand, and by the arm of his strength, "Surely I will no more give your grain to be food for your enemies; and foreigners shall not drink your new wine, for which you have labored: