Al-Istiqaamah by shaykh al-Islam ibn Taymiyyah

Al-Istiqaamah by ibn Taymiyyah dealing with the fundamental obligation to follow and align with the Quran and Sunnah in the chapter of the divine names and attributes and Tawheed, by word and beliefs. Ibn Taymiyya explains how the Qur'an and Sunnah include all the guidance while division and misguidance are only from neglect the two sources of legislation. The author also discuss the consequences of the abandonment of the strict adherence of the Qur'an and Sunna in the fundamentals and branches of the law, in fiqh, in Tasawwuf.