His saying: "O mankind, fear your Lord. Indeed, the convulsion of the Hour is a terrible thing" (al-Hajj: 1) means: the final blast.
قَوْله: ﴿يَا أَيهَا النَّاسُ اتَّقُوا رَبَّكُمْ إِنَّ زَلْزَلَةَ السَّاعَة شَيْء عَظِيم﴾ يَعْنِي: النفخة الْآخِرَة
