The result of the sins he used to do

Reference: al-Hifth – Ahammiyyatuhu, ‘Ajaa.ibuhu, Tareeqatuhu, Asbaabuhu – Page 67

‘Abdullaah ibn Mas’ood (radhi-yAllaahu ‘anhu) said:

Certainly, I consider a man who has forgotten knowledge which he used to possess to be the result of the sins he used to do.