Psalms 73:17 KJV

Until I went into the sanctuary of God; then understood I their end.
Psalms 73:17, King James Version

In context

16 When I thought to know this, it was too painful for me;

17 Until I went into the sanctuary of God; then understood I their end.

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