Since merchants, traders and businessmen in the past played a significant role in promoting the economic prosperity and quality level of society, there were scattered recommendations and teachings from the literary and historical elites, throughout Persian poetic and prose texts about them. Collecting and categorizing these teachings and recommendations, you can not only be familiar with how merchants buy and sell in the past society and how the people and the king interact with them, but also get the direction of these recommendations and teachings. Based on this study, dating back to the eighth century, we found that our ancestors and forefathers with their own commanding and forbidding had considered two "personal" and "commercial" aspects, one for the excellence of the soul and the self-purification of the merchants, and the other is useful to make progress and avoid losses. Therefore, in their words, individual and commercial necessities, are seen such as: good morality, conscientiousness and trustworthiness, the terms of the buyer and the seller, and the quality of the goods, the awareness of the need of the cities and so on. Additionally, there are no personal and commercial imperatives, in their speech such as not to sell underweight or not to sell oversight, not to swear, not to lie, discontinuity, not to have participation, and so on. If these recommendations are taken into account, the world and the future of businessmen and merchants will be better.