´It was narrated from Mu'adh bin Jabal that the Prophet (ﷺ) said:` "The great fierce battle, the conquest of Constantinople and the emergence of Dajjal, will all happen within seven months."
Hadith Referenceسنن ابن ماجه / كتاب الفتن / 4092
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:ضعيف, إسناده ضعيف, سنن أبي داود (4295) ترمذي (2238), انوار الصحيفه، صفحه نمبر 523
Hadith Takhrij«سنن ابی داود/الملاحم 4 ( 4295 ) ، سنن الترمذی/الفتن 58 ( 2238 ) ، ( تحفة الأشراف : 11328 ) ، وقد أخرجہ : مسند احمد ( 5/234 ) ( ضعیف ) ( سند میں ابو بکر ضعیف اور ولید بن سفیان ضعیف ہیں ) »
´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."
Shaykh Dr. Abdur Rahman Freywai
Urdu Footnote: Note: (In the chain of narration, two narrators—(Abu Bakr ibn Abi Maryam) and (Walid ibn Sufyan Ghassani)—are weak, and (Yazid ibn Qutayb) is len al-hadith [of weak reliability in hadith].)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 2238