‘ And Ruth the Moabitess said, “Yes, he said to me, ‘You shall keep close to my young people (the masculine noun covering both men and women), until they have completed all my harvest.”
Ruth then explained what Boaz had said to her, that she keep close to his young people for the remainder of the harvesting, where she would be safe from being molested, and could be sure of ample gleanings. Note again the reference to Ruth as ‘the Moabitess', which confirms that that fact is important to the writer's purpose.