2 Kings 11:6

and, a third, in the side-gate; and, a third, in the gate behind the runners, - so shall ye keep the watch of the house, by turns.

1 Chronicles 26:13-19

Yea they east lots, as the small so the great, by their ancestral house, for every several gate.

2 Chronicles 23:4-5

This, is the thing that ye shall do, - A third of you entering on the sabbath, both of the priests and of the Levites, as doorkeepers of the porch;

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
Yea they east lots, as the small so the great, by their ancestral house, for every several gate.
2 Chronicles 23:4
This, is the thing that ye shall do, - A third of you entering on the sabbath, both of the priests and of the Levites, as doorkeepers of the porch;