It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) asked: "Have you heard of a city, one side of which is on land and the other side in the sea?" The Companions (may Allah be pleased with them) said: Yes, O Messenger of Allah! He (peace and blessings be upon him) said: "The Hour will not be established until seventy thousand of Banu Ishaq attack it. When they reach it, they will encamp; they will neither fight with weapons nor shoot arrows, but they will say (aloud): 'La ilaha illallah wallahu akbar' (There is no true deity except Allah, and Allah is the Greatest), and one of its sides will fall. (The narrator Thawr said: I think he meant the side facing the land.) Then they will say it a second time: 'La ilaha illallah wallahu akbar', and its other side will fall. Then they will say it a third time: 'La ilaha illallah wallahu akbar', and the way will be opened for them. They will enter it and take spoils, and while they are dividing the spoils, suddenly a caller will cry out that the Dajjal has emerged, so they will leave everything and go back." Imam al-Hakim (may Allah have mercy on him) said: This city is Constantinople, and it is authentically established that its conquest will be close to the establishment of the Hour.