Hillel the Elder
The Prozbul ( of Greek origin; i.e. προσβολή, prosbolḗ = "delivery") was established in the waning years of the Second Temple of Jerusalem by Hillel the Elder. The writ, issued historically by rabbis, technically changed the status of individual private loans into the public administration, allowing the poor to receive interest-free loans before the Sabbatical year while protecting the investments of the lenders.