[15].Surah Al-Hjir [The Rocky Tract]: Ayat 25-27

Ayat 25. And verily, your Lord will gather them together (on the Day of Resurrection). Truly, He is All-Wise, All-Knowing.

Ayat 26. And indeed, We created man from sounding clay of altered black smooth mud.

Ayat 27. And the jinn, We created aforetime from the smokeless flame of fire.

Hazrat Ibn `Umar (May Allah be pleased with them) reported: I heard Messenger of Allah  [SAWW](PBUH) as saying, "Mankind will stand before Allah, the Rubb of the worlds (on the Day of Resurrection), some of them will stand submerged in perspiration up to half of their ears".  [Al-Bukhari Vol.8, Chapter 76, Hadith # 566]. 

Lesson : as mentioned above in Surah Al-Hjir Ayat 25. "And verily, your Lord will gather them together (on the Day of Resurrection). This Hadith gives us a glimpse of the horrible scene of the Resurrection when people will stand in awe before Allah.