17 The boundary will extend from the sea to Hazar Enan,a along the northern border of Damascus, with the border of Hamath to the north. This will be the northern boundary.

Read Ezekiel 47:17 Using Other Translations

And the border from the sea shall be Hazarenan, the border of Damascus, and the north northward, and the border of Hamath. And this is the north side.
So the boundary shall run from the sea to Hazar-enan, which is on the northern border of Damascus, with the border of Hamath to the north. This shall be the north side.
So the northern border will run from the Mediterranean to Hazar-enan, on the border between Hamath to the north and Damascus to the south.