No, jealousy is not allowed in Islam; it is considered a harmful and discouraged emotion.
According to the provided reference, jealousy is not just a sin in Islam, but it is regarded as one of the most discouraged and destructive emotions in any religion. Furthermore, psychologically, it is identified as a major illness that negatively impacts a person's mental peace and overall happiness. Therefore, Islam discourages jealousy due to its detrimental effects on individuals and their relationships.
