In plain terms
Mash
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Mash is wiping, rather than washing, a part of the body during wudu. It most often means wiping over the head, or over socks or a cast, in place of washing the foot or skin beneath. Conditions apply, such as putting the socks on while already in a state of purity.
Related terms
Wudu
Wudu is the ritual washing performed before prayer and other acts of worship. It follows a set sequence: washing the face, arms, and feet, and wiping the head. It is required…
Taharah
Taharah is the broader concept of ritual purity in Islamic law. It covers both the state a person must be in for prayer, and the cleanliness of the body, clothing, and place of…