Dua Upon Fearing Someone

اللهم انا نجعلك في نحورهم ونعوذ بك من شرورهم
'Allahumma inna naj'aluka fee nuhoorihim wa na'udhu bika min shuroorihim.'
(Oh Allah, we ask You to restrain them by their necks and we seek refuge in You from their evil.) (AD & Ns)