"And [We destroyed] 'Ad and Thamud"—meaning: And We destroyed 'Ad and Thamud. "And it has become clear to you from their dwellings"—meaning: what they saw of their ruins. "And they were endowed with insight"—in their misguidance.
Surah al-'Ankabut from (verse 39 - verse 40).
﴿وعادا وثمودا﴾ أَي: وأهلكنا عادا وثمودا ﴿وَقَدْ تَبَيَّنَ لَكُمْ مِنْ مَسَاكِنِهِمْ﴾ يَعْنِي: مَا رَأَوْا مِنْ آثَارِهِمْ ﴿وَكَانُوا مستبصرين﴾ فِي الضَّلَالَة.
سُورَة العنكبوت من (آيَة ٣٩ - آيَة ٤٠).