It is reported that Abū Qilābah – Allāh Have mercy on him – said:

It is only the storyteller-preachers (al-qusās) who have killed knowledge. A man listens to a storyteller for a year without really learning anything that will last, whereas a man who sits with a scholar for an hour  learns what will last  and benefit him before he even gets up.

Abō Nu’aym, Hilyatu Al-Awliyā` 2:287.