QurʾÄn and “Al- Khasf bi l- BaydÄʾ “
Several times, the word “Khasf†and its derivations were referred to, in Holy QurʾÄn.  For example: in Surah Al- Qasas, Verse 81 God stated,“Then We caused the earth to swallow him up and his house.â€Also in Surah Al- Nahl, Verse 45, God stated,