The answer is: Daughter-in-law

Ruth 1:22

In the Book of Ruth, we find a beautiful tapestry of loyalty woven with themes of friendship and family. Ruth, a Moabite woman, shows extraordinary commitment to her mother-in-law Naomi following the death of their husbands. This tight bond not only highlights the relationship of daughter-in-law but also emphasizes the goodness of kinship beyond bloodlines.

These seemingly simple kin relationships veer into something profound when we consider the cultural context of Ruth's choice. By staying with Naomi, Ruth defies societal expectations as a woman from a foreign lineage; in essence, she opts for love and devotion over returning to her own people for safety and security. Sites like the Fields of Moab or the town of Bethlehem—both vividly described—bring to life Ruth's journey and her righteous heart.

Moreover, interestingly, Ruth becomes a key figure in an ancestry that leads to the lineage of King David, making her story relevant beyond a personal saga. Echoing throughout the Scriptures, the theme of "covenant love"—redefining boundaries of family ties—can subsequently be seen in other narratives, reinforcing that love in many forms is divinely significant. In Hebrew, "chesed" describes this graciousness Ruth shows, which simply put, can be summed up with the idea of loving kindness — something not confined within walls of tradition or culture but rather blossoming every time someone acts with unfailing love.