Let not them grieve thee who vie one with another in the race to disbelief , of such as say with their mouths : " We believe , " but their hearts believe not , and of the Jews : listeners for the sake of falsehood , listeners on behalf of other folk who come not unto thee , changing words from their context and saying : If this be given unto you , receive it , but if this be not given unto you , then beware ! He whom Allah doometh unto sin , thou ( by thine efforts ) wilt avail him naught against Allah .