Tunnels are mentioned in the Quran in these verses:

[6:35] If their rejection gets to be too much for you, you should know that even if you dug a tunnel through the earth, or climbed a ladder into the sky, and produced a miracle for them (they still would not believe). Had God willed, He could have guided them, unanimously. Therefore, do not behave like the ignorant ones.

To learn more, read the Quran in English.

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