يُنفَخُ فِي الصُّورِ (رضی The Day when the Horn الصُّورِ [ Sur ] will be blown - 20:102) According to Sayyidna Ibn ` Umar اللہ تعالیٰ عنہما ، a Bedouin الصُّورِ asked the Holy Prophet ﷺ about صُور (the Horn) to which he replied that it is something like a horn which will be blown, meaning thereby that when the angel will blow into it all those who had lain dead for centuries will return to life. Only Allah knows the true nature of the Sur (the Horn).
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 108–111
On Doomsday, the earth will be turned into a flattened plain. At that time there will be neither the heights of the mountains nor the depths of the seas. All human beings will be reborn and assembled on this ground. In this world when God’s voice is directed to mankind through His spokesmen, it is ignored by many individuals. But, on Doomsday, when God will directly call the people, they will follow the direction of His voice without the slightest deviation. People will be so terrified that they will not be able to utter a single word. Except for the sound of dragging feet, no other sound will be heard.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.