This Aramaic phrase appears in Ezra 6:18, describing how the priests and Levites were set in their divisions for the service of God's house in Jerusalem. After the exile, reconstituting temple worship required organizing the clergy into their traditional courses or divisions. The term emphasizes structured, orderly worship—each group knowing its time and role. This wasn't arbitrary assignment but restoration of the Davidic system where priestly families served in rotation. The divisions ensured continuous temple service while distributing the honor and responsibility across all qualified families.