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A fool and his money are soon parted

Cultural  
  1. Foolish people do not know how to hold on to their money.


fool and his money are soon parted, a Idioms  
  1. A silly or stupid person readily wastes money. For example, Albert is known for giving waiters enormous tips—a fool and his money are soon parted. This proverbial expression has been cited again and again since the mid-1500s.