There is a belief in the East which is known by the name Nazr, a belief that any food or drink can have a poisonous effect upon the one who eats or drinks it if it has been exposed to an evil eye. This superstition is known in almost all parts of the East in some form or other, and the psychical idea behind it is that the intense feeling of envy produces a thought-current which must surely spread its poison, which causes harm to the one against whom the feeling works.