Albert Barnes Commentary Ezekiel 47:13

"Thus saith the Lord Jehovah: This shall be the border, whereby ye shall divide the land for inheritance according to the twelve tribes of Israel: Joseph [shall have two] portions." — Ezekiel 47:13 (ASV)

The ideal reallotment of the land to the twelve tribes of Israel is found in (Ezekiel 47:13–14).

The special mention of Joseph’s portions was in order to express that the twelve portions were to be exclusive of Levi’s land, which was to be provided out of the “oblation.”