Hawzah News Agency – Some disapproved transactions are as follows:
- selling real estate, unless one buys another real estate with the money acquired from the transaction;
- to be a butcher;
- selling shrouds (kafans);
- transactions with people of low character;
- transactions between the start of the time for the morning (ṣubḥ) prayer and sunrise;
- making one’s profession the buying and selling of wheat, barley, and suchlike;
- intervening in someone else’s transaction in order to buy the goods that the other person wishes to buy.
Source: https://www.sistani.org/english/book/48/