Be cautious at the time of anger

It has been narrated:

Satan came to Abdullah bin Hanzaleh and said:  I am eager to teach you something, Abdullah said: I have no tendency to learn from you. The Satan said: O Abdullah! Listen to me, if what I say is to your benefit accept it, otherwise stay away from me.  O son of Hanzaleh! Do not ask except from Allah Almighty and at the time of anger be careful where you are headed!

Source: Islamic mysticism