Kitab al-Fitan · Nu'aym ibn Hammad

Abdullah bin Marwan told us, and Abu Asim Yunus Al-Tanukhi told me, on the authority of Ismail bin Al-Ala bin Muhammad Al-Kalbi, on the authority of his father, who said: “If a letter is read to the Abbasids at the beginning of the day: From Abdullah Abdullah, Commander of the Faithful, then wait for a letter to be read to you at the end of the day: From Abdullah Abdul Rahman, Commander of the Faithful.”