1 Chronicles 9:22

All those that were chosen to be porters in the gates were
two hundred and twelve
As fixed in the days of David, and might not be fewer:

these were reckoned by their genealogies in their villages;
where they dwelt:

whom David and Samuel the seer did ordain in their set office;
the scheme was first drawn by Samuel the prophet, and communicated to David, who put it into execution, to be constantly and perpetually observed.