'Slippery' in the Bible

Let their way be dark and slippery, with the angel of Yahweh pursuing them.

Surely you set them on slippery places. You cause them to fall onto ruin.

"{Therefore} their way will be to them like the slippery places, they will be pushed in the darkness, and they will fall into it, for I will bring disaster on them [in] the year of their punishment," {declares} Yahweh.