سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
See n. 1040 to vii. 65 for the 'Ad people and their location. Here the emphasis is on the fact that they were materialists believing in brute force, and felt secure in their fortresses and resources, but were found quite helpless when Allah's Message came and they rejected it.