ENOfficial
Allāhummak-finīhim bimā shi't. O Allah, suffice (i.e. protect) me against them however You wish. Reference: Muslim 4/2300.
Source: sunnah.com
Other translations
Arabic
اللَّهُمَّ اكْفِنِيهِم بمَا شِئْت
sunnah.com
Hisn al-Muslim
Book 1Hadith Number 132