Fath al-Rabbani

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Eventually, the wall will be opened for Gog and Magog, and they will come out towards the people, as Allah Almighty has said: {مِنْ کُلِّ حَدَبٍ یَّنْسِلُوْنَ} (Surah Al-Anbiya: 96) (They will descend swiftly from every height), they will spread over the earth, and the Muslims, to protect themselves from their evil and tribulations, will lock themselves in their cities and fortresses and will also take their cattle with them. Gog and Magog will drink so much water from the earth that when some of them pass by a river, they will drink it in such a way that the river will dry up. Those who come after them will say about that river that there used to be water here. When every person will be locked in his fortress or city (and they will have complete control over the earth), then one of the Gog and Magog will say: We have finished with the people of the earth, only those in the sky remain. Then one of them will move his spear and throw it towards the sky, and the spear will return blood-stained as a trial and test for them. (Seeing this, they will say that we have also prevailed over those in the sky). While they are in such a state, Allah Almighty will create a worm in their necks, like the larvae of locusts in their necks, and because of this, all of them will die in such a way that not even a movement will be heard from them. The Muslims will say to each other: Is there anyone who will sacrifice himself and bring news of what has happened to Gog and Magog? One Muslim, thinking he will be killed there, will go to see the state of the enemy, but when he reaches among them, he will see that they are all lying dead on top of each other. He will call out to the Muslims: O group of Muslims! Rejoice, Allah Almighty has destroyed your enemy. Then the Muslims will come out of their cities and fortresses and let their cattle out to graze. The food of these cattle will be the flesh of Gog and Magog; never before had they been so satiated by eating grass as they will be by eating their flesh.