The answer is: Winnowing barley

Ruth 3:2

At the threshing floor, Boaz was winnowing barley, a crucial step in the harvest process where the chaff—the inedible husks—is separated from the grain. This scene is not just about agriculture; it's rich with symbolism and cultural significance! In ancient Israel, the threshing floor was often a communal area where decisions were made and relationships were forged.

During harvest, you'd see gatherings depicting hard labor, perseverance, and community spirit. Think about it: as Boaz worked diligently, he was not just preparing food but also trusting in the fruitful season following a hopeful period of sowing. The connection here extends beyond farming. The practice resonates deeply with themes of sustenance and care which are highlighted throughout biblical narratives.

Additionally, things get intriguing when you consider the broader context of Ruth, which not only showcases loyalty and dedication but also serves to ally themes of divine provision and human initiative. This meeting at the threshing floor leads Ruth to present a wonderful picture of empowerment with her bold actions, echoing the noble ideals of justice and redemption that emerge from their interaction.

Interestingly, this act at the threshing floor also introduces discussions about social customs of gleaning and redeeming family land, emphasizing the importance of communal relationships in the histories of Israel. The story marks a turning point that leads to a lineage celebrated in the genealogy of Jesus and reveals how acts of humility and courage can change destinies. Isn’t it fascinating how multi-layered these stories can be?