What every BY girl knows. . .
Of course this is the source for Rashi's comment on that verse of Ruth 2: 5, but, intersetingly, he reverse the order and mentions tznius before chochma. And in the further simplified commentary offered to young girls, the chochma seems to get lost altogether. Knowledge is not stressed in the lessons to little girls about heroine-like behavior, though it should be, as it really refers to knowledge of halacha. And ignorance of halacha leads to violation of halacha. In fact, what Naomi was supposed to have taught Ruth along the way to Israel was halacha.