'Slippery' in the Bible

The LORD will cut off all slippery lips, and the tongue that boasts great things,

Let their way be dark and slippery: and let the angel of the LORD persecute them.

Surely thou didst set them in slippery places: thou castedst them down into destruction.

The LORD stands guard over the stranger; he supports both widows and orphans, but makes the path of the wicked slippery.