The Cave - 18:99
On that Day We will leave them. They will enter one another in waves. We blow on the horn; We gather them all together.
Related:
The Prophets/21:96
Finally, when the way is opened for Jajjuj and Majuj, they will attack from every direction.
The Prophets/21:97
"The fulfillment of the Word of truth has come near, and the eyes of the disbelievers have been filled with fear: "Woe to us, we were heedless of this, we were indeed the wrongdoers."