3-86 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Sa’ed ibn Abdullah quoted on the authority of Ahmad ibn Aba Abdullah al-Barqy, on the authority of his father, on the authority of Safvan ibn Yahya, on the authority of Abdul Rahman ibn al-Haj’jaj that Aba Abdullah as-Sadiq (MGB) said, “Satan (May God Damn him) told his followers, ‘There are three things which once a man does I will overcome him and not worry about his other deeds. These things are: Overestimating his deeds; forgetting his sins and becoming conceited.’”