According to search-discovered classical Islamic scholarship, the concept of Shifa (healing) in the Quran represents a divine remedy primarily for spiritual ailments of the heart. Ibn Kathir's tafsir on verse 17:82 clarifies that the Quran acts as a cure for doubt, hypocrisy, shirk, and misguidance. This spiritual healing is a direct manifestation of Allah's mercy (Rahmah) for the believers. Furthermore, verse 41:44 intrinsically links this healing to guidance (Hidayah), establishing that the Quran heals by rectifying belief and purifying the soul. While its primary function is spiritual, the prophetic Sunnah confirms its application for physical healing through the practice of Ruqyah (recitation of verses for healing), as analyzed by scholars like Ibn al-Qayyim. This synthesis of scriptural evidence and scholarly interpretation establishes the Quran as a comprehensive source of health, addressing both the soul and body through divine guidance and mercy.