Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Yajuj and Majuj will be released and they will rush upon the people, as Allah Almighty has said: 'They will come from every elevation, hastening.' (__QUR_N__: Surah Anbiya: 96) They will spread across the earth, and the Muslims, to save themselves from them, will retreat into their cities and fortresses, taking their livestock with them. Yajuj and Majuj will drink up the water of the earth, (and they will drink so much water that) some of them will pass by a river and drink all its water, and the river will become dry. When those who come after them pass by, they will say: 'There used to be water here at one time.' When no human being remains except those who have taken refuge in fortresses or cities (whom they can see), they will say: 'These were the people of the earth, (their story is finished), we have dealt with them; now only the people of the heavens remain. (We should think about overpowering them.)' So one of them will shake his spear with some force and throw it towards the sky, and it will return blood-stained. This will be a trial and tribulation for them. While they are in this state, suddenly Allah Almighty will create a worm like that of a locust in their necks, because of which all of them will die, and no sound will be heard from them. The Muslims will say: 'Is there anyone who will risk himself to see what the enemy is doing?' One man, with the intention of reward, will go out, thinking that he will be killed. He will descend (from his fortress or city) and find them dead, their corpses lying on top of each other. He will call out: 'O assembly of Muslims! Listen carefully! Rejoice, Allah Almighty has sufficed you against your enemies.' They will come out of their fortresses and cities, and will graze their livestock, and there will be no fodder for them except their flesh; by eating that flesh, they will become as fat and healthy as they used to be by eating the best fodder."