Sunan Ibn Majah, Book 24, Hadith 2885 (In-Book) ⓘ
It was narrated from Anas bin Malik that the Messenger of Allah said: “The horizons will be opened to you, and you will conquer a city called Qazvin. Whoever is stationed there for forty days or forty nights, will have pillars of gold in Paradise, with green chrysolite and 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.’”
حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَسَدٍ، حَدَّثَنَا دَاوُدُ بْنُ الْمُحَبَّرِ، أَنْبَأَنَا الرَّبِيعُ بْنُ صَبِيحٍ، عَنْ يَزِيدَ بْنِ أَبَانَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " سَتُفْتَحُ عَلَيْكُمُ الآفَاقُ وَسَتُفْتَحُ عَلَيْكُمْ مَدِينَةٌ يُقَالُ لَهَا قَزْوِينُ مَنْ رَابَطَ فِيهَا أَرْبَعِينَ يَوْمًا أَوْ أَرْبَعِينَ لَيْلَةً كَانَ لَهُ فِي الْجَنَّةِ عَمُودٌ مِنْ ذَهَبٍ عَلَيْهِ زَبَرْجَدَةٌ خَضْرَاءُ عَلَيْهَا قُبَّةٌ مِنْ يَاقُوتَةٍ حَمْرَاءَ لَهَا سَبْعُونَ أَلْفَ مِصْرَاعٍ مِنْ ذَهَبٍ عَلَى كُلِّ مِصْرَاعٍ زَوْجَةٌ مِنَ الْحُورِ الْعِينِ " .
also referenced under: Hadith 2780 (Reference) & Volume 4, Book 24, Hadith 2780 (DarusSalam)