Charles Ellicott Commentary Psalms 55:10

"Day and night they go about it upon the walls thereof: Iniquity also and mischief are in the midst of it." — Psalms 55:10 (ASV)

They go. —It is quite in keeping with the Hebrew style to suppose mischief and strife personified here as the ancient versions do, and not only occupying the city as inhabitants, but prowling about its walls. So in the next verse corruption (see Psalm 5:9, Note), deceit, and guile are personified. Compare Virgil’s

“ubique
Luctus, ubique Pavor, et plurima mortis imago.”