The word(s) "fortresses" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And you make strong fortresses that perhaps you may

(2) And He drove down those of the followers of the Book who backed them from their fortresses and He cast awe into their hearts; some you killed and you took captive another part.

(3) They made for him what he pleased of fortresses and images, and bowls (large) as watering-troughs and cooking-pots that will not move from their place; give thanks, O family of Dawood! and very few of My servants are grateful.

(4) He it is Who caused those who disbelieved of the followers of the Book to go forth from their homes at the first banishment you did not think that they would go forth, while they were certain that their fortresses would defend them against Allah; but Allah came to them whence they did not expect, and cast terror into their hearts; they demolished their houses with their own hands and the hands of the believers; therefore take a lesson, O you who have eyes!