The Sanctuary of the Muslims in the Great Epic Battle

Ali ibn al-Ja'd narrated to us, Abd al-Rahman ibn Thawban informed us, from his father, from Makhul, from Jubayr ibn Nufayr, from Malik ibn Yukhamir, from Mu'adh ibn Jabal (may Allah be pleased with him), that the Messenger of Allah (ﷺ) said: "The eruption of the Great Epic Battle (al-Malhamah) will lead to the conquest of Constantinople, and the conquest of Constantinople will lead to the emergence of the Dajjal (False Messiah)."

Then he struck the thigh of the one whom he was addressing (meaning Mu'adh) or his shoulder, and said: "Indeed, this is as certainly true as the fact that you are right here."