Ezekiel 48:31

And the gates of the city shall be after the names of the tribes of Israel, bearing the names of the individual tribes: three gates northward, one gate of Reuben, as the first-born in point of time, one gate of Judah, as the first-born by virtue of the patriarchal blessing, one gate of Levi, as the one chosen to be the representative of all the first-born in Israel in the service of the Lord.