18 Surely you place them on slippery ground; you cast them down to ruin.

Read Psalm 73:18 Using Other Translations

Surely thou didst set them in slippery places: thou castedst them down into destruction.
Truly you set them in slippery places; you make them fall to ruin.
Truly, you put them on a slippery path and send them sliding over the cliff to destruction.