Hadees: Rasullulah ﷺ ne irshaad farmaaya: Jab momin banda koi gunah karta hai, to us ki wajah se us ke dil par ek siyaah nukta lag jaata hai

phir jab woh us gunah se ruk jaata hai aur toba wa istigfaar kar leta hai,

to (woh kaala nukta khatm hojaata hai aur) dil bilkul saaf hojaata hai

(aur agar us ne toba wa istigfaar nahin kiya) aur mazeed gunah karta raha to dil ki woh siyaahi badhti jaati hai

yahaan tak ke poore dil par chha jaati hai.

(Tirimizi: 3334)