by God or is eternal and "uncreated." Sunnis (who make up about 85–90% of Muslims) hold that the Quran is uncreated—a doctrine that has been unchallenged among them for many centuries. Shia Twelvers and Zaydi, and the Kharijites—believe the Quran was created. Sufi philosophers view the question as artificial or wrongly framed. Inimitability Inimitability of the Quran (or "") is the belief that no human speech can match the Quran in its content and form. The Quran is considered an inimitable miracle by Muslims, effective until the Day of Resurrection—and, thereby, the central proof granted to Muhammad in authentication of his prophetic status. The concept of inimitability originates in the Quran where in five different verses opponents are challenged to produce something like the Quran: "If men and jinn banded together to produce the like of this Quran they would never produce its like not though they backed one another." From the ninth century, numerous works appeared which studied the Quran and examined its style and content. Medieval Muslim scholars including al-Jurjani (d. 1078) and al-Baqillani (d. 1013) have written treatises on the subject, discussed its various aspects, and used linguistic approaches to study the Quran. Others argue that the Quran contains noble ideas, has inner meanings, maintained its freshness through the ages and has caused great transformations at the individual level and in history. Some scholars state that the Quran contains scientific information that agrees with modern science. The doctrine of the miraculousness of the Quran is further emphasized by Muhammad's illiteracy since the unlettered prophet could not have been suspected of composing the Quran. In worship The first surah of the Quran is repeated in daily prayers and on other occasions. This surah, which consists of seven verses, is the most often recited surah of the Quran: Other sections of the Quran of choice are also read in daily prayers. Respect for the written text of the Quran is an important element of religious faith by many Muslims, and the Quran is treated with reverence. Based on tradition and a literal interpretation of Quran ("none shall touch but those who are clean"), some Muslims believe that they must perform a ritual cleansing with water (wudu or ghusl) before touching a copy of the Quran, although this view is not universal. Worn-out copies of the Quran are wrapped in a cloth and stored indefinitely in a safe place, buried