The answer is: 10

Ruth 4:2

In the book of Ruth, specifically in chapter 4, we find an intriguing scene set at the city gate, which functions as a bustling area for social and legal matters. Here, Boaz gathers ten elders, a number rich with significance in ancient Israelite society. This number often symbolizes completeness or unity; think of the Ten Commandments that embody the law foundational to the Israelite faith.

When Boaz presents the legal right to redeem Ruth, he's not just sealing a deal—he’s engaging in a culturally significant act of love and responsibility while ensuring Naomi’s family line is preserved. This public assembly of elders signifies the importance of transparency and community in that society. Imagine it akin to today’s town hall meetings, where civic leaders address local issues before active participants.

Now, intriguingly, the story of Ruth and Boaz foreshadows greater redemptive themes found throughout the biblical narrative. It's quite fascinating to see how Ruth—a Moabite woman—becomes part of the lineage of David and ultimately, as per Christian tradition, the genealogy of Jesus. That’s a powerful plot twist!

Additionally, these ancient customs hint at broader values of kinship, loyalty, and divine providence in everyday life. In this case, love wasn’t confined by borders, history, or ethnicity; instead, through this watershed moment at the gate, love transcends to develop a new family narrative crucial to the unfolding story of humanity.