Ka‘b (al-Ahbar) said: In the earlier scriptures, I find the description of a people who will seek knowledge without action, and will learn jurisprudence for purposes other than worship, and will seek the world in exchange for deeds of the Hereafter, who will wear sheepskins, whose hearts will be more bitter than aloes, they will deceive through me and will deceive me myself, I have sworn that I will raise such a trial among them that even the forbearing and patient will be astonished.