13. It is narrated from him (narrator of the Hadith above) from Ahmad ibn Muhammad from ibn Faddal from ibn Bukayr from abu Basir who has said the following:

“I heard Abu ‘Abdillah saying, ‘When a man commits a sin a black dot appears in his heart. If he then repents, the dot will disappear, if he commits more sins it will increase until it will take over his heart and he then will never have salvation.’”