NET
13 You march out to deliver your people, to deliver your special servant. You strike the leader of the wicked nation, laying him open from the lower body to the neck. Selah.
Darby
13 Thou wentest forth for the salvation of thy people, For the salvation of thine anointed; Thou didst smite off the head from the house of the wicked, Laying bare the foundation even to the neck. Selah.
KJV
13 Thou wentest forth for the salvation of thy people, [even] for salvation with thine anointed; thou woundedst the head out of the house of the wicked, by discovering the foundation unto the neck. Selah.