It wasnarrated from Anas bin Malik that the Messenger of Allah (ﷺ)said:
"The horizons will be opened to you, and you will conquer a citycalled Qazvin. Whoever is stationed there for forty days or fortynights, will have pillars of gold in Paradise, with green chrysoliteand topped by a dome of rubies. It will have seventy thousand doors,at each door will be a wife from among the wide-eyed houris.'" (FR)
English reference (FR): Vol. 4, Book 24, Hadith 2780 (FR)
Arabic reference (FR): Book 24, Hadith 2885 (FR)