Hisham bin 'Ammar bin Nasayr هشام بن عمار بن نصير · Battles (Kitab Al-Malahim)

The Prophet (ﷺ) said: The time between the great war and the conquest of the city (Constantinople) will be six years, and the Dajjal (Antichrist) will come forth in the seventh. Abu Dawud said: This is sounder than the tradition narrated by Isa (bin Yunus)