Group 6 Surah Qāf (50) – Sūrah Tahrīm (66) Validation of the Day of Jugdement, warning of the Quraysh with its reference and the spiritual purification of the believers and their segregation from the disbelievers Group Seven Sūrah Mulk (67) – Sūrah Nās (114) Warning the leadership of the Quraysh of the consequences of the Hereafter, conclusive communication of the truth to them, and, as its result, threatening them with punishment, and delivering glad tidings to Muhammad (sws) of the supremacy of the truth in Arabia.