“O Allah, we ask You to restrain them by their necks and we seek refuge in You from their evil.”
اللّهُـمَّ إِنا نَجْـعَلُكَ في نُحـورِهِـم، وَنَعـوذُ بِكَ مِنْ شُرورِهـمْ
Allaahumma ‘innaa naj’aluka fee nuhoorihim wa na’oothu bika min shuroorihim.
Abu Dawud 2/89, and Al-Hakim graded it authentic and Ath-Thahabi agreed 2/142.