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)
Sunan Abi Dawud Book 39, Hadith 6
← Previous Hadith The Prophet (ﷺ) said: The greatest war, the conquest of Constantinople and the coming forth of the Dajjal (Antichrist) will take place within a period of seven months.

Sunan Abi Dawud Book 39, Hadith 5 Next Hadith → The Prophet (ﷺ) said: The people will soon summon one another to attack you as people when eating invite others to share their dish. Someone asked: Will that be because of our small numbers at that time? He replied: No, you will be numerous at that time: but you will be scum and rubbish like that carried down by a torrent, and Allah will take fear of you from the breasts of your enemy and last enervation into your hearts. Someone asked: What is wahn (enervation). Messenger of Allah (ﷺ): He replied: Love of the world and dislike of death.

Sunan Abi Dawud Book 39, Hadith 7