The book of Al-Jawahir

A: The book of Al-Jawahir fi `Uqubat Ahl Al-Kaba'ir by Shaykh Zayn Al-Din Al-Malibary is not considered a reliable source with regard to rulings, distinguishing between major sins and minor ones, Du`a's (supplications), or Adhkar (invocations). We advise you to refer to the book of Bulugh Al-Maram by Ibn Hajar, its explanation Subul Al-Salam by Al-San‘any, and Nayl Al-Awtar Sharh Muntaqa Al-Akhbar by Al-Shawkany regarding Hadith Al-Ahkam (Hadith containing legal rulings). Moreover, you may refer to the book of Al-Kalim Al-Tayyib by Ibn Taymiyyah, and Al-Adhkar by Al-Nawawy regarding Du`a's and Adhkar while we advise you to refer to the book of Al-Kaba'ir by Al-Dhahaby, and Al-Kaba'ir by Ibn Hajar Al-Haytamy to obtain reliable knowledge about major sins and their punishment.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.