Charles Ellicott Commentary Psalms 35:6

"Let their way be dark and slippery, And the angel of Jehovah pursuing them." — Psalms 35:6 (ASV)

Dark and slippery. —See margin. Delitzsch supposes an allusion to the passage of the Red Sea, but the picture suggests rather the passage of some dangerous mountain pass in a raging storm. "The tracks in the limestone hills of Palestine are often worn as smooth as marble; compare Psalm 73:18" (quoted from Kay, in the Speaker’s Commentary).