2 Kings 11:6

A third are to be at the Sur gate and a third at the gate behind the guards. You are to take turns providing protection for the palace.

1 Chronicles 26:13-19

They cast lots for each gate according to their ancestral houses, young and old alike.

2 Chronicles 23:4-5

This is what you are to do: a third of you, priests and Levites who are coming on duty on the Sabbath, are to be gatekeepers.

Treasury of Scripture Knowledge

Summary

And a third part shall be at the gate of Sur; and a third part at the gate behind the guard: so shall ye keep the watch of the house, that it be not broken down.

Bible References

The gate of sur

1 Chronicles 26:13
They cast lots for each gate according to their ancestral houses, young and old alike.
2 Chronicles 23:4
This is what you are to do: a third of you, priests and Levites who are coming on duty on the Sabbath, are to be gatekeepers.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.