(44) Muhammad bin Hammam narrated from Ja’far bin Muhammad bin Malik from Mo’awiya bin Hakeem that Ahmad bin Muhammad bin Abu Nasr had said: “I heard Imam ar-Redha saying:

“Before this matter (the appearance of al-Mahdi) there will be (bayooh).” I did not know the meaning of (bayooh). When I went to offer the hajj, I heard a nomad saying: “This is a (bayooh) day.” I asked him: “What does (bayooh) mean?” He said: “It means very hot.”