Arabic (Original)
حَدَّثَنَا وَكِيعٌ عَنْ شَرِيكٍ عَنْ عَلِيِّ بْنِ زَيْدٍ عَنْ أَبِي قِلَابَةَ عَنْ ثَوْبَانَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا رَأَيْتُمْ الرَّايَاتِ السُّودَ قَدْ جَاءَتْ مِنْ خُرَاسَانَ فَأْتُوهَا فَإِنَّ فِيهَا خَلِيفَةَ اللَّهِ الْمَهْدِيَّ.
English Translation
Waki' narrated to us, from Sharik, from 'Ali ibn Zayd, from Abu Qilabah, from Thawban, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "When you see the black banners coming from Khurasan, then go to them, for among them is the caliph of Allah, al-Mahdi."