'Portion' in the Bible

But the Levites will not have an allotted portion among you, for their inheritance is to serve the Lord. Gad, Reuben, and the half-tribe of Manasseh have already received their allotted land east of the Jordan which Moses the Lord's servant assigned them."

Simeon's assigned land was taken from Judah's allotted portion, for Judah's territory was too large for them; so Simeon was assigned land within Judah.