The revelation of the Qur’aan in seven styles (ahruf, sing. harf) I have read that during the third Khalief, Oethmaan, a committee under supervision of Zaid ibn Thabit has been ordered to make an official editorship of the whole Koran. But this “Oethmanian” text didn’t give yet a uniform reading. Because early arabic language didn’t have vowels and also some consonants had the same or almost the same form. New signs were introduced to seperate the different letters. But this still did not stop the different ways of reading. In the first half of the fourth/tenth century the ‘imaam of the Koran readers’ in Baghdad, Ibn Moedjahid, gave a solution to this problem. He said that the word harf should be put equivalent to kira’a. He declared seven ways of reading correct. Because according to him the saying of the Prophet (PBUH) that the Koran was send in seven ahroef means that seven ways of reading are inspired. Nowadays only to ways of reading are in use, Warsj of Nafi’ and Hafs of ‘Asim. Could you tell me more about these different ways of reading? Are there ahadieth about this?