2 Chronicles 23:4

This is the thing that you must do: one third of you priests and Levites {coming off duty on the Sabbath} [shall be] gatekeepers at the entrances

And their brethren in their villages [were] to come [every] seven days {by turn} [to be] with these.

And the Levites thirty years old and above were counted, and their number according to their head count for the men [was] thirty-eight thousand.

And David, with Zadok of the sons of Eleazar and Ahimelech of the sons of Ithamar, divided them according to their appointments for their service.

And they cast lots, small and great alike, by their fathers' houses, {for their gates}.

And it happened that [while] he was serving as priest before God in the order of his division,

Treasury of Scripture Knowledge

This is the thing that ye shall do; A third part of you entering on the sabbath, of the priests and of the Levites, shall be porters of the doors;

And the Levites thirty years old and above were counted, and their number according to their head count for the men [was] thirty-eight thousand.

And David, with Zadok of the sons of Eleazar and Ahimelech of the sons of Ithamar, divided them according to their appointments for their service.

And it happened that [while] he was serving as priest before God in the order of his division,

And they cast lots, small and great alike, by their fathers' houses, {for their gates}.