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)
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ بَيْنَ الْمَلْحَمَةِ وَفَتْحِ الْمَدِينَةِ سِتُّ سِنِينَ وَيَخْرُجُ الْمَسِيحُ الدَّجَّالُ فِي السَّابِعَةِ