'Grain' in the Bible

And Ruth the Moabite said to Naomi, "Please let me go [to] the field and glean among the ears of grain after [someone] in whose eyes I [may] find favor." And she said to her, "Go, my daughter."

And Boaz said to her {at mealtime}, "Come here and eat from the bread and dip your morsel in the wine vinegar." So she sat beside the gleaners, and he offered to her roasted grain. And she ate and was satisfied, and she had some left over.

And Boaz ate and drank [until] his heart was {merry} [and then] he came to lie at the end of the grain heap. And she came in quietly and {uncovered} his feet and lay down.