Jamieson-Fausset-Brown on Ezekiel 48:6
Reuben--doomed formerly for incest and instability "not to excel" (Gen 49:4). So no distinguished prophet, priest, or king had come from it. Of it were the notorious Dathan and Abiram, the mutineers. A pastoral and Bedouin character marked it and Gad (Jdg 5:16).
Adam Clarke on Ezekiel 48:9
The oblation - This was a portion of land twenty-five thousand cubits in length, by ten thousand broad; in the center of which was the temple, which must be destined for the use of the priests, the Levites, and the prince.
John Gill on Ezekiel 48:9
The oblation that ye shall offer to the Lord,.... That which belonged to the sanctuary, and to the priests, which was taken and separated for that use; which here, and in the following verses, is particularly and separately considered:
shall be of five and twenty thousand in length; that is, five and twenty thousand reeds from east to west:
and of ten thousand in breadth; from north to south; see Ezekiel 45:3.
Tyndale Open Study Notes on Ezekiel 48:9-14
The holy portion was not quite at the exact center of the land; there were seven tribal strips to the north and only five to the south of it. While it was still not exactly central geographically, the spiritual center had apparently moved a significant distance north from where it used to be in Jerusalem. • The importance of the holy portion set aside for the Lord’s Temple is underlined by the detailed description of its dimensions and makeup, in contrast with the brevity of the descriptions of the tribal allocations. This special portion was devoted to God and was never to be sold or traded or used by others. It was made up of strips that ran from east to west and were allocated to the Levi…
Read the whole note in the consoleRashi on Ezekiel 48:9
The offering that you shall separate for the Lord From this portion that was separated alongside Judah on their south, whose length is from the east to the sea and whose width is 25,000 rodsfrom it shall be the offering for the Lord for the Sanctuary and a place for houses for the priests, the length 25, 000 rods from east to west and the width 10,000 north to south.