Quran Ar-Ra'd 13:11

Translation

For him [i.e., each one] are successive [angels] before and behind him who protect him by the decree of Allāh. Indeed, Allāh will not change the condition of a people until they change what is in themselves. And when Allāh intends for a people ill, there is no repelling it. And there is not for them besides Him any patron.