It is reported that Khālid b. Ma’dan – Allāh have mercy on him – said: Whoever seeks praise by going against the truth, Allāh will throw it back upon him as blame, and whoever faces blame in order to conform to the truth, Allāh will return it as praise for him. Al-Dhahabī, Siyar A’lām Al-Nubalā` […]
Do Not Beautify Yourself with Knowledge
It is reported that Ḥabīb b. ʿUbayd – Allāh have mercy on him – said:
Learn knowledge, understand it and benefit from it (live by it); and do not study it in order to decorate yourself with it, for if you live long you will likely see a time when knowledge will be used for beautification like a man beautifies himself with his garments.
Ibn Al-Mubārak, Al-Zuhd wa Al-Raqāʾiq no. 1056.
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Ibn Masud mentions some of the worst sins related to belief and worship of Allah.
Faulting others for what they have repented from can reflect the sin on oneself.