There is one hadith in Sahih Muslim(collection of prophet's saying) which mention about dabiq. Given below is that hadith.
The Last Hour would not come until the Romans would land at al-A'maq
or in Dabiq. An army consisting of the best (soldiers) of the people
of the earth at that time will come from Medina (to counteract them).
When they will arrange themselves in ranks, the Romans would say: Do
not stand between us and those (Muslims) who took prisoners from
amongst us. Let us fight with them; and the Muslims would say: Nay, by
Allah, we would never get aside from you and from our brethren that
you may fight them. They will then fight and a third (part) of the
army would run away, whom Allah will never forgive. A third (part of
the army) which would be constituted of excellent martyrs in Allah's
eye, would be killed and the third who would never be put to trial
would win and they would be conquerors of Constantinople. And as they
would be busy in distributing the spoils of war (amongst themselves)
after hanging their swords by the olive trees, the Satan would cry:
The Dajjal has taken your place among your family. They would then
come out, but it would be of no avail. And when they would come to
Syria, he would come out while they would be still preparing
themselves for battle drawing up the ranks. Certainly, the time of
prayer shall come and then Jesus (peace be upon him) son of Mary would
descend and would lead them in prayer. When the enemy of Allah would
see him, it would (disappear) just as the salt dissolves itself in
water and if he (Jesus) were not to confront them at all, even then it
would dissolve completely, but Allah would kill them by his hand and
he would show them their blood on his lance (the lance of Jesus
Christ). http://sunnah.com/muslim/54/44
I do not know more about this hadith, like authenticity, what it mean etc.