Reference : Hisn al-Muslim 132

اللَّهُمَّ اكْفِنِيهِم بمَا شِئْت
Allāhummak-finīhim bimā shi't.


O Allah, suffice (i.e. protect) me against them however You wish.

Reference:
Muslim 4/2300.

Chapter: When being afraid of a group of people