 In this way, the concept of magic was used to prescribe what was appropriate as religious belief and practice.Similar claims were also being made in the Islamic world during this period.The Arabian cleric Muhammad ibn Abd al-Wahhab—founder of Wahhabism—for instance condemned a range of customs and practices such as divination and the veneration of spirits as "sihr", which he in turn claimed was a form of "shirk", the sin of idolatry.