Quran 15:82 from Surah Al-Hijr on Divine Marvels.
وَكَانُواْ يَنۡحِتُونَ مِنَ ٱلۡجِبَالِ بُيُوتًا ءَامِنِينَ
English translation: And they used (to) carve from the mountains houses secure
Transliteration: wakanu yanhituna mina al-jibali buyutan aminina