“The explanation of the words of the Holy Prophet, ‘People of the city must not sell to the people of countryside’ is that fruits and all kinds of grains which are transported from countryside to the market place, it (their sale) then is not permissible for the people of the market place to buy such items from them to sell to the people. The transporting ones from the countryside and wilderness must sell them. However, those who transport such items from one city to another city can sell them because it is like trading.’”