فَإِنَّمَا هِيَ زَجْرَةٌ وَاحِدَةٌ فَإِذَا هُمْ يَنظُرُونَ (19)
(37:19) There will be a single stern rebuff and lo, they will be observing with their own eyes (all that they had been warned against). *12
*12) That is, "When the time comes for this, it will not be difficult to reestablish the whole world. Just a single shout will be enough to make the people to wake up. Here, the word "shout" or "cry" is very meaningful. It depicts the Resurrection as though the people who had died since the beginning of the creation till the last Day, were lying asleep, and a sudden command to them to "wake up" will cause them to rise up all at once."