Surah Al-Hijr, ayah 82

وَكَانُواْ يَنۡحِتُونَ مِنَ ٱلۡجِبَالِ بُيُوتًا ءَامِنِينَ ٨٢

Wakānū yanhitūna minal-jibāli buyūtan āminīn

And they used to carve from the mountains, houses, feeling secure.