Hadith 2238
´Abu Bahriyyah, a Companion of Mu'adh bin Jabal narrated that the Prophet(s.a.w) said:` "The great Malhamah, the conquest of Constantinople, and the coming of the Dajjal occur in (the span of) seven months."
Hadith 2239
´Anas bin Malik said:` "Constantinople will be conquered with the coming of the Hour."