Fear at the mention of Allah
The first quality mentioned for the essentials of being certified as a Mu’min was trembling of the hearts out of fear at the mention of Allah Ta’ala. The general Arabic word for fear is “Khauf” while the word used in this verse of Surah Anfal is “al Wajl”. Imam Fakhrud Deen Razi rahimahullah mentions “People of Ma’rifah say that there are two types of khauf (fear), Khauf al iqaab (fear of punishment) and Khauf al Adhmah wal Jalaal (Fear of greatness and might)…