Because of the voice of the enemy, because of the oppression of the wicked: for they cast iniquity upon me, and in wrath they hate me.
Because of the voice of the enemy - reproaching (Psalms 55:12) and cutting me like 'a drawn sword,' while outwardly uttering 'smooth' things (Psalms 55:21).
For they cast iniquity upon me - i:e., an iniquitous device (Psalms 41:7).