Abdullah bin Maymun عبد الله بن ميمون بن داود القداح · Chapters On Al-Fitan

"Safinah narrated to me, he said: 'The Messenger of Allah(s.a.w) said: "Al-Khilafah will be in my Ummah for thirty years, then there will be monarchy after that."' Then Safinah said to me: 'Count the Khilafah of Abu Bakr,' then he said: 'Count the Khilafah of 'Umar and the Khilafah of 'Uthman.' Then he said to me: 'Count the Khilafah of 'Ali."' He said: "So we found that they add up to thirty years." Sa'eed said: "I said to him: 'Banu…