Ruth meets Boaz (Ruth, Chapter 2) - When she got to Bethlehem with her mother-in-law Naomi, Ruth began working.  In particular, she was harvesting "corn" when the local landowner (or lord) approached her.  His name was Boaz.

So right there we have a problem.  Corn is something that was only known in the Americas, and the Americas were not known to the people of the Middle East at that time.  Whoever translated the King James Bible must have confused "corn" with some other crop - perhaps wheat?

Anyways, Boaz basically just told Ruth that he's welcome in his field, that she should feel free to drink water and eat, and that he generally admires her for leaving her homeland to be with them.

Basically, it was just a nice gesture of hospitality to the young woman.

Now, if we could just figure out how they got corn in the field 3,000 years before they knew it existed!