اَللَّهُمَّ إِنَّا نَجْعَلُكَ فِي نُحُورِهِمْ وَنَعُوذُ بِكَ مِنْ شُرُورِهِمْ
Transliteration
Allahumma inna naj'aluka fi nuhurihim wa na'udhu bika min shururihim
English meaning
O Allah, we make You our shield against them and seek refuge in You from their evil.
When is it recited?
In fear of enemies or harm.
Source
Abu Dawud, Witr 26