Narrated Ibn 'Abbas: The Prophet ﷺ forbade the selling of foodstuff before receiving it. I consider that all types of selling should be done similarly.
The Prophet ﷺ also taught us about honesty and trustworthiness in our dealings with others. He wanted us to be fair and honest with each other, so that everyone can benefit from our transactions without being taken advantage of or cheated out of their money or goods. By following these teachings, we can ensure fairness and justice for everyone involved in any transaction or sale.