1 Chronicles 4:31
And at Beth-marcaboth, and Hazar-susim, and at Beth-birei, and at Shaaraim. These were their cities unto the reign of David. And at Beth-marcaboth, and Hazar-susim, and at Beth-birei, and at Shaaraim. These were their cities unto the reign of David.
The verse names four towns, Beth-marcaboth, Hazar-susim, Beth-birei, and Shaaraim, as belonging to the descendants of Simeon. These were among the cities allotted to the Simeonites. They remained their cities until the reign of David.
Those who held the cities to be Judah's taught that the verse lists cities belonging to the tribe of Judah and that they remained its cities until David's reign. In that understanding the chapter's careful preservation of Judah's genealogy and records reflects the integrity of the tribes. Through Judah's line Christ came.
As part of a long genealogical record, the verse shows that God is particular. A faithful record of every soul is kept in the books of heaven.