The Ruling on Forbidden Sales and the Explanation of the Defectiveness of Prohibited Transactions

Question:
And Honorable Shaykh, fear Allah. Is every non-forbidden thing invalid and defective, based on the principle that prohibition implies defectiveness?

Answer:
Yes, every forbidden sale is invalid, because prohibition implies defectiveness. The sale of pebbles, the sale involving excessive uncertainty, the sale by a resident to a traveler, the sale to travelers at the edge of the city, all the sales that the Prophet (peace and blessings be upon him) prohibited, or that Allah prohibited, such as selling after the second call to the Friday prayer, all these sales are invalid because they involve disobedience to Allah and His Messenger, so they are invalid. Allah only permitted sales that do not involve harm, do not involve excessive uncertainty, and do not involve ignorance. Yes.