Abu Bahriyyah, a Companion of Mu’adh bin Jabal narrated that Prophet صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ said: “The great Malhamah, the conquest of Constantinople, and the coming of the Dajjal occur in (the span of) seven months.” (Jami` at-Tirmidhi 2238)
Narrated Mu’adh ibn Jabal:
The Prophet صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ said: The flourishing state of Jerusalem will be when Yathrib is in ruins, the ruined state of Yathrib will be when the great war comes, the outbreak of the great war will be at the conquest of Constantinople and the conquest of Constantinople when the Dajjal (Antichrist) comes forth. He (the Prophet) struck his thigh or his shoulder with his hand and said: This is as true as you are here or as you are sitting (meaning Mu’adh ibn Jabal). (Sunan Abi Dawud 4294)
Yusair b. Jabir reported:
Once there blew a red storm in Kufah that there came a person who had nothing to say but (these words): `Abdullah b. Mas`ud, the Last Hour has come. He (`Abdullah b. Mas`ud) was sitting reclining against something, and he said: The Last Hour would not come until shares of inheritance are not distributed and there is no rejoicing over spoils of war. Then he said pointing towards Syria, with the gesture of his hand like this: The enemy shall muster strength against Muslims and the Muslims will muster strength against them (Syrians). I said: You mean Rome? And he said: Yes, and there would be a terrible fight and the Muslims would prepare a detachment (for fighting unto death) which would not return but victorious. They will fight until night will intervene them; both the sides will return without being victorious and both will be wiped out. The Muslims will again prepare a detachment for fighting unto death so that they may not return but victorious. When it would be the fourth day, a new detachment out of the remnant of the Muslims would be prepared and Allah will decree that the enemy should be routed. And they would fight such a fight the like of which would not be seen, so much so that even if a bird were to pass their flanks, it would fall down dead before reaching the end of them. (There would be such a large scale massacre) that when counting would be done, (only) one out of a hundred men related to one another would be found alive. So what can be the joy at the spoils of such war and what inheritance would be divided! They would be in this very state that they would hear of a calamity more horrible than this. And a cry would reach them: The Dajjal has taken your place among your offspring. They will, therefore, throw away what would be in their hands and go forward sending ten horsemen, as a scouting party.
The Messenger of Allah صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ said: “I know their names, and the names of their fathers, and the colours of their horses. They will be the best horsemen on the face of the earth at that time” or “among the best horsemen on the face of the earth at that time.” Narrated by Muslim (2899).
“And there is no city but that We will destroy it before the Day of Resurrection or punish it with a severe punishment. That has ever been in the Register inscribed.” (Holy Quran 17: 58)
“Then watch for the Day when the sky will bring a visible smoke. Covering the people; this is a painful torment. (Holy Quran 44: 10,11)
Narrated by Hazrat Huzaifah (RA) that the Holy Prophet صَلىَّ اللهُ عَلَيْهِ وَسَلَّمْ stated that:
“Qiyamah will not come till you see ten signs, which are: Smoke which spreads throughout the East and West for forty days….” (Sahih Muslim)
“And indeed, We will make that which is upon it [into] a barren ground.” (Holy Quran 18:8)