Wudu, in Islam, is a minor ablution required to remove a minor ritual impurity, badath, which is incurred in everyday life. Following the niyya, the face is washed with pure water, the mouth and nose are also rinsed, then the hands and arms are washed up to the elbow; the head is rubbed with water; and the feet are washed up to the ankles. Wudu is usually carried out before each of the five daily prayer times. A.G.H.
Bowker, John, The Oxford Dictionary of World Religions, New York, Oxford University Press, 1997, p. 9