Sikhism is a religion founded by Guru Nanak. It considers its scripture, the Guru Granth Sahib, as the living Guru. Sikhs install it in the sanctum of Sikh temples, and devotees reverentially greet it by bowing and prostrating before it. Since the early 20th century, Farquhar and other scholars consider it as a form of idolatry that believers practice the "matha tekna" (bowing down and touching one's head to the floor) at the door of a Gurdwara or before the Guru Granth Sahib, and other daily rituals such as putting the scripture to bed ("sukhasan") in a bedroom ("sachkhand"), waking it up every morning, carrying it in a procession and re-opening it ("prakash") in major Sikh Gurdwaras. When open in the sanctum of a Sikh Gurdwara, it is within an expensive brocade and attendants fan it as an act of homage.