Ruth 2:9

9. go unto the vessels, and drink of that which the young men have drawn—Gleaners were sometimes allowed, by kind and charitable masters, to partake of the refreshments provided for the reapers. The vessels alluded to were skin bottles, filled with water—and the bread was soaked in vinegar (Ruth 2:14); a kind of poor, weak wine, sometimes mingled with a little olive oil—very cooling, as would be required in harvest-time. This grateful refection is still used in the harvest-field.