Two fasts and two kinds of sale are forbidden: fasting on the day of `Id ul Fitr and `Id-ul-Adha and thekinds of sale called Mulamasa and Munabadha. (These two kinds of sale used to be practiced in thedays of Pre-Islamic period of ignorance; Mulamasa means when you touch something displayed forsale you have to buy it; Munabadha means when the seller throws something to you, you have to buyit.)