Khasf al-Bayda (Arabic: خسف البیداء) (lit.
“Swallowing the land of Bayda”),[1][2][3][4] in Islamic eschatology, is a future event in which the Earth will swallow up Bayda, a desert area between Mecca and Medina.
According to Islamic traditions: the army of Sufyani will be swallowed up in the land of Bayda.
[11] According to hadiths, there are five (or more) certain signs which will happen prior to the reappearance of the twelfth (last) Imam of Shia Islam, al-Mahdi.
[12][13] Al-Shaykh al-Saduq has narrated --from Ja'far al-Sadiq-- that: five signs are decisive before the rising of Qa'im (قائم): Yamani, Sufyani, Heavenly cry (calling) from the sky, The murder of Nafs-e-Zakiyyah and Khasf al-Bayda.