2 Chronicles 23:4

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 their brethren, who were in their villages, were to come after seven days from time to time with them.

Now the Levites were numbered from the age of thirty years and upward: and their number by their polls, man by man, was thirty and eight thousand.

And David distributed them, both Zadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, according to their offices in their service.

And they cast lots, as well the small as the great, according to the house of their fathers, for every gate.

And it came to pass, that, while he executed the priests' office before God in the order of his course,

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;

Now the Levites were numbered from the age of thirty years and upward: and their number by their polls, man by man, was thirty and eight thousand.

And David distributed them, both Zadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, according to their offices in their service.

And it came to pass, that, while he executed the priests' office before God in the order of his course,

And they cast lots, as well the small as the great, according to the house of their fathers, for every gate.