Ar-Ra'd 13:11

For each person there are successive angels[7] in front of him and behind him, guarding him by the command of Allah. Allah does not change the condition of a people until they change their own attitude and conduct[8]. But if Allah intends punishment for a people[9], then it cannot be averted, nor will there be any protector for them besides Him.

[7] Angels tasked with each human; they alternate and take day and night shifts.
[8] As long as people acknowledge Allah’s grace on them and are grateful to Him, He will not show them other than mercy, and vice versa. If they persist in disobedience, then let them not be fooled by the respite they are given, for Allah’s command can come at any moment.
[9] Because of their sins.

For him [i.e., each one] are successive [angels][631] before and behind him who protect him by the decree of Allāh.[632] 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,[633] there is no repelling it. And there is not for them besides Him any patron.

[631] Replacing each other by turn.
[632] The phrase may also be rendered "...who guard him from [everything except] the decree of Allāh."
[633] i.e., punishment or destruction because of their sins.

11. For him (each person), there are angels in succession, before and behind him.[1] They guard him by the Command of Allâh. Verily! Allâh will not change the (good) condition of a people as long as they do not change their state (of goodness) themselves (by committing sins and by being ungrateful and disobedient to Allâh). But when Allâh wills a people’s punishment, there can be no turning back of it, and they will find besides Him no protector.

[1] (V.13:11) See the footnote (B) of (V.6:61).

For him are angels ranged before him and behind him, who guard him by Allah's command. Lo! Allah changeth not the condition of a folk until they (first) change that which is in their hearts; and if Allah willeth misfortune for a folk there is none that can repel it, nor have they a defender beside Him.