Only that which was effective for the first of this community will be effective for the last of it

Only that which was effective for the first of this community will be effective for the last of it

Knowledge is not to be taken from four types of people: a foolish person who openly acts foolish, even if he reports the most narrations; an adherent of bid'ah who calls to his desires; a person who lies, even if I don't accuse him of lying in hadith; and a righteous pious worshiper who does not accurately retain what he narrates.