This book Fortress of the Muslim – Invocations from the Quran and Sunnah by Dawah Corner is an abridgment of my earlier work entitled, Adh-Dhikr wad-Du’a wal-‘llaj bir-Ruqyah mina’-Kitab was-Sunnah. In order to make it small and easily portable, I have chosen only the section on words of remembrance for this abridgment. To achieve this, I only mentioned the text of the words of remembrance instead of the entire Hadith.