The Revival of Knowledge
It is reported that Imām Al-Zuhrī – Allāh have mercy on him – said:
Those of our scholars who went before us used to say,”Adherence to the Sunnah is salvation, but knowledge is taken away quickly, so the revival of knowledge means the stability of religion and worldly affairs, and the loss of knowledge means the loss of all that.”
Al-Lālakā`ī, Sharh Usūl I’tiqād Ahl Al-Sunnah article 136
Also read
Related sayings.
Sometimes the manners you learn from a scholar surpass the piece of knowledge you get from him.
Imām Al-Zuhrī said: Verily, knowledge has calamities [that afflict it]. One of its calamities is when the scholar is left, until he goes away with his knowledge. Another calamity is forgetting [knowledge]. Yet another calamity is lying about [knowledge], and this is the worst type. Ibn ‘Abd Al-Barr, Jāmi’ Bayān Al-‘Ilm article 684.