Kitab al-Fitan · Nu'aym ibn Hammad

إذا اختلف أصحاب الرايات السود بينهم كان خسف قرية بإرم، يقال لها حرستا، وخروج الرايات الثلاث بالشام عندها

If the owners of the black banners disagreed among themselves, a village in Iram, called Harasta, would be eclipsed, and the three banners would emerge in the Sham (Greater Syria) at that time.

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Traced to Ka'b al-Ahbar (automatic guess): a report of earlier scriptures, not a hadith of the Prophet ﷺ.

إذا خسف بقرية يقال لها حرستا، وخلع خليفتان من بني العباس، واختلف آل العباس بينهم حتى يرفع فيهم اثنا عشر لواء، وثنتا عشرة راية، فعندها يغلب عليهم الفتن في دار ملكهم، وبها يجتمعون، فعند ذلك الآخرة، ويعبر جيحون، وبها يجتمعون، وعند ذلك سقوط ملكهم، وخروج البربر على الشام

If a village called Harasta is eclipsed, and two caliphs from the Abbasids are deposed, and the Abbasids disagree among themselves until twelve banners and twelve banners are raised among them, then turmoil will prevail over them in the abode of their kingship, and they will gather in it, and at that time the Hereafter, and the Gihon will cross, and in it they will gather, and at that time their king will fall, and the barbarians will emerge from the Sham (Greater Syria).

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