The centrality of the Quran in the religious life of the Kufans that Umar described was quickly changing, however. A few decades later, a letter was sent to the Ummayad caliph Abd al-Malik ibn Marwan regarding the Kufans: "They abandoned the judgement of their Lord and took hadiths for their religion; and they claim that they have obtained knowledge other than from the Koran . . . They believed in a book which was not from God, written by the hands of men; they then attributed it to the Messenger of God."[74]