2 Kings 7:10
So they went and called out to the gatekeepers of the city, saying, "We went to the Aramean camp and no one was there--not a trace--only tethered horses and donkeys, and the tents were intact."

1 Chronicles 9:22
The number of those chosen to be gatekeepers at the thresholds was 212. They were registered by genealogy in their villages. David and Samuel the seer had appointed them to their positions of trust.