Three attempts to conquer Constantinople by Muslims

“You will conquer Constantinople three times: (1) the first time, you shall be tested heavily; (2) the second time, there will be truce between you and them ˹until you build a mosque in their city and you and they will battle as enemies behind Constantinople:˺ and (3) as for the third time, Allah will help you conquer it with takbīrs: then Allah will destruct a third of it, burn a third of it, and divide the remaining third in measures.”  

"إِنَّكُمْ سَتَغْزُونَ القَسْطَنْطِينيةَ ثَلاَثَ غَزَوَاتٍ، الأولَى: يُصيبُكُمْ فيهَا بَلاَءٌ، وَالثانِيةُ: يَكُونُ بَيْنَكُمْ وَبَيْنَهُمْ صُلح (حَتَّى تَبْنُوا فِى مَدينَتِهِمْ مَسْجدًا، وَتَغْزُونَ أنْتُمْ وَهُمْ عَدُوًا وَرَاءَ القُسْطَنْطِينِيَّةِ)، وَأمَّا الثَّالِثَةُ! فَيَفْتَحُهَا الله علَيكمْ بِالتَّكْبيرَات، فَيُخَرِّبُ اللهُ ثُلُثَهَا ويحرق الله ثلثها، وَتَقْتَسمُوَنَ الثُّلُثَ البَاقِىَ كيْلًا".