This was used to cover the walls of houses, Leviticus 14:42-48; Daniel 5:5; and was also spread on large stones, on which the law could be inscribed. Deuteronomy 27:2-4; Joshua 8:32 . It may have been compounded of different substances for divers purposes. In Isaiah 38:21 plaister is used in a medical sense as spread on a boil.