2 Kings 11:6

One third are to stand guard at the Sur Gate. The other third are to stand guard at the gate behind the other guards.

1 Chronicles 26:13-19

Lots were cast for each gate, according to their families, young and old alike.

2 Chronicles 23:4-5

You must do this: One third of you, the priests and Levites who are on duty on the day of worship, must guard the gates.

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
Lots were cast for each gate, according to their families, young and old alike.
2 Chronicles 23:4
You must do this: One third of you, the priests and Levites who are on duty on the day of worship, must guard the gates.