As one of these signs, Imam Ahmad reports in his Musnad that Abdullah bin Amr bin Al-’As (ra) mentioned: “Whilst we were around the Prophet (saw) writing he was asked, ‘Which of the two cities will be opened first, Constantinople or Rome?‘ He (the Prophet Muhammad) answered, ‘The city of Heraclius will be opened first!’”
Surely, Constantinople (Istanbul) will be conquered (by my community); how blessed the commander who will conquer it, and how blessed his army.
What a blessed leader he was!

