حِصْنُ الْمُسْلِمِ
Hisn al-Muslim 126
Fortress of the Muslim (Hisn al-Muslim)
Upon encountering an enemy or those of authority
اللّهُـمَّ إِنا نَجْـعَلُكَ في نُحـورِهِـم، وَنَعـوذُ بِكَ مِنْ شُرورِهـمْ
Allāhumma innā naj`aluka fī nuḥūrihim wa na`ūdhu bika min shurūrihim. O Allah, we ask You to restrain them by their necks, and we seek refuge in You from their evil. Reference: Abu Dawud 2/89, and Al-Hakim graded it authentic and Ath-Thahabi agreed 2/142.
Hisn al-Muslim, 126