Two fasts and two kinds of sale are forbidden: fasting on the day of ʿId ul Fitr and ʿId-ul-Adha and the kinds of sale called Mulamasa and Munabadha. (These two kinds of sale used to be practiced in the days of Pre-Islamic period of ignorance; Mulamasa means when you touch something displayed for sale you have to buy it; Munabadha means when the seller throws something to you, you have to buy it.)
عَنْ صِيَامَيْنِ وَبَيْعَتَيْنِ الْفِطْرِ وَالنَّحْرِ وَالْمُلاَمَسَةِ وَالْمُنَابَذَةِ