The inheritance of the Simeonites was taken from the territory of Judah, because the share for Judah’s descendants was too large for them. So the Simeonites received an inheritance within Judah’s portion.
KJV
Out of the portion of the children of Judah [was] the inheritance of the children of Simeon: for the part of the children of Judah was too much for them: therefore the children of Simeon had their inheritance within the inheritance of them.
ASV
Out of the part of the children of Judah was the inheritance of the children of Simeon; for the portion of the children of Judah was too much for them: therefore the children of Simeon had inheritance in the midst of their inheritance.