your sustainer is fully aware of what you are if he so wills he will bestow grace upon you and if he so wills he will chastise you. hence we have not sent thee with the power to determine their fate seeing that thy sustainer is fully aware of all beings that are in the heavens and on earth. but indeed we did endow some of the prophets more highly than others just as we bestowed upon david a book of divine wisdom 
ربكم أعلم بكم إن يشأ يرحمكم أو إن يشأ يعذبكم وما أرسلناك عليهم وكيلا وربك أعلم بمن في السماوات والأرض ولقد فضلنا بعض النبيين على بعض وآتينا داوود زبورا