My fellow brother and pastor Toby Sumpter makes this excellent connection between Ruth and the Proverbs 31 woman:
Boaz praises Ruth and blesses her. He says that Ruth is known among all the city’s inhabitants as being a virtuous woman. But the word there for ‘virtuous’ is the Hebrew word ‘kahyil’ which is usually used to describe a courageous man of arms, a warrior. Ruth is a valiant warrior-woman. But what’s really neat is the fact that in the Hebrew Bible, Ruth comes just a couple of books after Proverbs. And the book of Proverbs ends with the beautiful passage describing the ‘virtuous woman’. In fact, the word ‘virtuous’ is also the word ‘kahyil’, thus Proverbs ends describing the valiant warrior-woman.