Jamieson-Fausset-Brown on Ezekiel 48:15
The five thousand rods, apportioned to the city out of the twenty-five thousand square, are to be laid off in a square of four thousand five hundred, with the two hundred fifty all around for suburbs.
profane--that is, not strictly sacred as the sacerdotal portions, but applied to secular uses.
Adam Clarke on Ezekiel 48:21
And the residue - for the prince - His portion was alongside that of the Levites, from west to east; these were on each side twenty-five thousand cubits in length, from the east to the west. by twelve thousand five hundred cubits in breadth from north to south. The space both above and below was equal, between the tribe of Judah and that of Benjamin to north and south; and the portion of the Levites, which had Judah and Benjamin to the north and south, and the portion of the prince to the east and to the west. See the map.
John Gill on Ezekiel 48:22
Moreover, from the possession of the Levites, and from the possession of the city,.... Or, "beyond" these, as it may be rendered, on the other side of them; or, "except" (z) these:
being in the midst of that which is the prince's; between his two portions; or, as it is next explained,
between the border of Judah, and the border of Benjamin, shall be for the prince; that is, all beyond and excepting that which belonged to the priests and Levites, the sanctuary and the city, were the prince's, which lay between Judah and Benjamin: or thus it was; before the holy oblation one part of the prince's portion ran, parallel with the tribe of Judah, east and west; after the holy oblation on the othe…
Read the whole note in the consoleTyndale Open Study Notes on Ezekiel 48:21-29
The area filling out the rest of the central portion to the east and west of the holy square was assigned to the prince. The prince was more important than the rest of the laity, but he was below the priests and Levites. The same message was delivered by the architecture of the Temple complex.