John Gill Commentary Ezekiel 26:19

"For thus saith the Lord Jehovah: When I shall make thee a desolate city, like the cities that are not inhabited; when I shall bring up the deep upon thee, and the great waters shall cover thee;" — Ezekiel 26:19 (ASV)

For thus says the Lord God

Both to the terror of Tyre, and for the comfort of his people: when I shall make you a desolate city, like the cities that are not inhabited;

whose trade is ruined, whose inhabitants are destroyed, and whose walls are broken down, and become a mere waste and desert; where no person or anything of value are to be seen: when I shall bring up the deep upon you, and the great waters shall cover you:

the waters of the sea shall rush in and overflow the city, the walls of it being broken down; just as the old world, and the cities of it, were overflowed with the deluge, to which the allusion may be; whether this was literally accomplished on Tyre is not certain; perhaps it is to be taken in a figurative sense, and to be understood of the large army of the Chaldeans that should come up against it, and overpower it.

So the Targum, "when I shall bring up against them an army of people, who are many as the waters of the deep, and many people shall cover you; see (Revelation 17:15Revelation 17:16) ."