1 Chronicles 9:22-24

22All those selected to be gatekeepers at the entrances numbered 212. Their names were recorded in the genealogical records of their settlements. David and Samuel the prophet had appointed them to their positions.

23They and their descendants were assigned to guard the gates of the Lord’s sanctuary (that is, the tabernacle).

24The gatekeepers were posted on all four sides – east, west, north, and south.