Ibn Taymiyyah
Ibn Taymiyyah held the belief that Hell was not eternal even for unbelievers. According to Ibn Taymiyyah, Hell is therapeutic and reformative, and God's wise purpose in chastising unbelievers is to make them fit to leave the Fire. This view contradicted the mainstream Sunni doctrine of eternal hell-fire for unbelievers. Ibn Taymiyyah was criticised for holding this view by the chief Shafi scholar Taqi al-Din al-Subki who presented a large body of Qur'anic evidence to argue that unbelievers will abide in hell-fire eternally.