Regarding the middle prayer

217. ´Abdullah bin Mas´ud narrated: The polytheists detained the Messenger of Allah salla alayhi wa sallam from the ´Ars until the sun became red or yellow. Upon this, the Messenger of Allah salla alayhi wa sallam said: ´´They have kept us busy to perform the middle prayer, the ´Ars prayer. May Allah fill their bellies and their graves with fire (or he said: May Allah stuff their bellies and graves with fire).´´