Joshua 21:40

So all the cities for the children of Merari by their
families
Which were distributed by lot to them, according to the number of their families, and were sufficient for them:

which were remaining of the families of the Levites;
the last division of them, besides those of the Kohathites, Levites, and the Gershonites:

were [by] their lot twelve cities;
four out of the tribe of Zebulun, four out of the tribe of Reuben, and four out of the tribe of Gad, whose names are before given,