Musannaf Ibn Abi Shaybah 40411 — Reports on the tribulation

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that he said: The last rebel group to emerge in Islam will emerge at al-Rumaylah, the Rumaylah of al-Daskarah (which is built like a palace). People will go out against them, and a third of them will be killed, a third will enter (a place of safety), and a third will be besieged in a monastery, the monastery of Marmari (which is in the outskirts of Samarra, near the Wasif Bridge). Among them will be men with grizzled hair. The people will besiege them and bring them down (from the monastery and the like) and kill them. This will be the last rebel army to emerge in Islam.