Out of the portion of the children of Judah [was] the
inheritance of the children of Simeon
Which is the reason why no description is given of the border of their inheritance, because that is before given in the account of the lot of Judah:
for the part of the children of Judah was too much for them:
they had more cities than they could fill with people, and more land than they could cultivate; they had an hundred fourteen cities with their villages:
therefore the children of Simeon had their inheritance within the
inheritance of them;
the one being a small tribe, and the other large, and for the reasons given; (See Gill on Joshua 19:1).