Al-Ahwas b. Hakim told on his father’s authority that a man asked
the Prophet about evil, and he replied, "Do not ask me about evil, but
ask me about good,” saying it three times. Then he said, "The worst
evil consists in learned men who are evil, and the best good consists in
learned men who are good.” Darimi transmitted it.
Sufyan said that ‘Umar b. al-Khattab asked Ka‘b who were the lords
of knowledge, and he replied that they are those who act according to
what they know. He then asked what it is that takes knowledge from
the hearts of the learned and was told that it is covetousness. Darimi
transmitted it.
Abu Darda’ said that the one who would have the worst position in
God’s sight on the day of resurrection would be a learned man who did
not profit from his learning.” Darimi transmitted it.
Al-A‘mash reported God’s messenger as saying, "The calamity
which affects knowledge is forgetfulness, and wasting it is to convey it to
those who are unworthy of it.” Darimi transmitted it in mursal form.
