'Grain' in the Bible

And Ruth the Moabitess said to Naomi, “Please let me go to the field and glean among the ears of grain after one in whose sight I may find favor.” And she said to her, “Go, my daughter.”

At mealtime Boaz said to her, “Come here, that you may eat of the bread and dip your piece of bread in the vinegar.” So she sat beside the reapers; and he served her roasted grain, and she ate and was satisfied and had some left.

Also you shall purposely pull out for her some grain from the bundles and leave it that she may glean, and do not rebuke her.”

When Boaz had eaten and drunk and his heart was merry, he went to lie down at the end of the heap of grain; and she came secretly, and uncovered his feet and lay down.