Envy (ḥasad) is a spiritual disease that Islam strongly condemns, not only for its harmful impact on individuals but also for its destructive influence on communities. This article explores the concept of envy in Islamic teachings, identifying its causes, harms, and remedies, and provides actionable guidance to protect against its effects. By understanding the wisdom behind the prohibition of ḥasad, believers can purify their hearts and strengthen their relationship with Allah.