Qur'an 21:96 Al-Anbya

حَتَّىٰٓ إِذَا فُتِحَتْ يَأْجُوجُ وَمَأْجُوجُ وَهُم مِّن كُلِّ حَدَبٍۢ يَنسِلُونَ

Until when [the dam of] Gog and Magog has been opened and they, from every elevation, descend

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