(An-Naba') 78 : 18
يَوْمَ يُنْفَخُ فِي الصُّورِ فَتَأْتُونَ أَفْوَاجًا

 The Day the trumpet will be blown; then you will come in crowds.

As explained in verse 39: 68, at the first blowing of the Trumpet, everyone in the universe will fall dead except those whom Allah wills. By the second blowing, people will stand up from their graves individually and will rush as different crowds to the place of Judgement—Mecca in Saudi Arabia, the center of the world—without looking anywhere. By the third trumpet, all will be assembled at Mecca, as explained in verses 36: 53-54. See explanation 36: 51-52; 39: 68-69; 70: 43-44; and 99: 6.