The name of the Videvdad liturgy indicates that it is directed against the
daevas and their polluting influence in the world. It is held during
ushanin, i.e., the period of the day lasting from midnight to dawn, when their influence is assumed to be the strongest. The performance of the liturgy lasts serveral hours and is performed by two priests typically within a
fire temple. Due to its length, the Videvdad liturgy is the only liturgy in which the use of a written aid, namely the
Vendidad text, is allowed. Given that its main aim is to repel the influce of pollution, it is performed at mainly three occasion: the
Barashnom, honouring the dead, and the establishment of an
Atash Behram.
Barashnom The major Zoroastrian purification ritual is the
Barashnom, also known as the
Barashnom of the nine nights. Its purpose is to cleanse a person of the corrupting influence of the
nasu (the Zoroastrian
daeva of corpes), after coming into contact with dead matter. During this ritual, the dedication in the Videvdad is to
Sraosha since this divinity is connected with casting out the daevas.
Honouring the dead In the
Rivayats, two different occasions are described for a celebration of the Videvdad liturgy relating to the dead. First, a series of three ceremonies may be performed for a recently deceased in order to guide their soul into the afterlife. A second occasion for the celebration of the Videvdad is the founding of a
dakhma, i.e., a tower of silence used for the
excarnation of dead people. Like in the
Barashnom ceremony, the dedication during these rituals is to Sraosha.
Establishment of the Atash Behram The third occasion on which a Videvdad may be celebrated is the establishment of a
Atash Behram, i.e., the highest level fire in Zoroastrianism. The details of this procedure vary in the literature. For instance in the
Wizīrgard ī Dēnīg, a series of several Yasna and Videvdad liturgies is described for each of the 91 collected fires. Modi, however, describes a series of Yasna and Videvdad liturgies for a number days. ==References==