In this article, the concept, history and high importance of the endowment institution were discussed from the point of view of Sharia and law, and its benefits and effects in people's social life, jurisprudential and legal opinions about how to become the best competitors of waqf are stated. The research method is descriptive-analytical with a comparative approach and the means of collecting information are books of interpretations, theses and articles.



. The results of the research show that the endowment can be considered as one of the financial supports in the economic and social sphere of the country. Following the jurisprudential books and articles, it shows that there are different legal and jurisprudential opinions regarding the improvement of competitors, which while paying attention to these issues and at the same time referring to the solutions of experts, these opinions can be brought closer to each other. In this article, the researcher tried to explain the sale or conversion to Ahsan by comparing the similarities and differences of jurisprudence and legal opinions and citing rational arguments..

The summary of jurisprudential opinions shows that if the survival of the endowment is useful and necessary, according to all the jurists, no one has the right to interfere in the "ain", but if the survival of the endowment is harmful or not useful, all According to the themes of the hadiths and the ruling of reason, they consider it permissible to sell and transform it into a better one.