(And whoso desireth the Hereafter) i.e. Paradise by performing that which was made obligatory upon him (and striveth for it with the effort necessary) strives to enter Paradise by performing the acts that lead to it, (being a believer) and besides this he is a sincere believer; (for such, their effort) their works (findeth favour (with their Lord)) their works are accepted. This verse was revealed about Bilal the Muezzin.