15. Trials Take Place When Knowledge Is Sought for Other Than Actions
On the authority of 'Ali (ra) that he made mention of trials occuring at the end of time. 'Umar (ra) asked him, "When will that be, O 'Ali?"
He said, "When understanding of the religion is sought for other purposes, and knowledge is acquired for other than acting upon, and wordly gain is sought with the actions of the Hereafter".
('Abdar Razzaq in his Mussanaf as a statement of 'Ali. It is also in Sahih at-Targhib at-Tarhib, no.106)