section_path: Recitation/Variant readings
section_name: Variant readings
paragraph_text: Variant readings
  
  The variant readings of the Quran are one type of textual variant. According to Melchert (2008), the majority of disagreements have to do with vowels to supply, most of them in turn not conceivably reflecting dialectal differences and about one in eight disagreements has to do with whether to place dots above or below the line. Nasser categorizes variant readings into various subtypes, including internal vowels, long vowels, gemination (shaddah), assimilation and alternation.
  
  It is generally stated that there are small differences between readings. However, these small changes may also include differences that may lead to serious differences in Islam, ranging from the definition of God to practices such as the formal conditions of ablution.
  
  The first Quranic manuscripts lacked marks, enabling multiple possible recitations to be conveyed by the same written text. The 10th-century Muslim scholar from Baghdad, Ibn Mujāhid, is famous for establishing seven acceptable textual readings of the Quran. He studied various readings and their trustworthiness and chose seven 8th-century readers from the cities of Mecca, Medina, Kufa, Basra and Damascus. Ibn Mujahid did not explain why he chose seven readers, rather than six or ten, but this may be related to a prophetic tradition (Muhammad's saying) reporting that the Quran had been revealed in seven ahruf. Today, the most popular readings are those transmitted by Ḥafṣ (d. 796) and Warsh (d. 812) which are according to two of Ibn Mujahid's reciters, Aasim ibn Abi al-Najud (Kufa, d. 745) and Nafi' al-Madani (Medina, d. 785), respectively. The influential standard Quran of Cairo uses an elaborate system of modified vowel-signs and a set of additional symbols for minute details and is based on ʻAsim's recitation, the 8th-century recitation of Kufa. This edition has become the standard for modern printings of the Quran. Occasionally, an early Quran shows compatibility with a particular reading. A Syrian manuscript from the 8th century is shown to have been written according to the reading of Ibn Amir ad-Dimashqi. Another study suggests that this manuscript bears the vocalization of himsi region.
  
  Accordinng to Ibn Taymiyyah vocalization markers indicating specific vowel sounds (tashkeel) were introduced into the text of the Qur'an during the lifetimes of the last Sahabah.