Surah 18 Al Kahf (Cave) Verses 29-31 session 11.
If the truth reaches a person and it's rejected, then he has oppressed himself.
A fire is thus prepared that hems them in, with a dreadful drink; "Muhul" water (molten, viscous, thick, black and with ultimate temperature range).
However, believers are rewarded an eternal paradise. With adornment of golden crowns, bracelets, green silk garments and reclining thrones.