Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:11:68 –

As if they had never prospered therein. Unquestionably, Thamud denied their Lord; then, away with Thamud.  

as if (ka-an had been softened and its subject omitted, in other words ˹understand it as˺ ka’annahum) they had not dwelt there, in their dwelling-place: ‘Lo! Thamūd disbelieved in their Lord, lo! away with Thamūd!’ (this may be read, declined, li-Thamūdan, or left, as indeclinable, li-Thamūda, referring to the district or the tribe).
القرآن:١١:٦٨ –

كَأَنْ لَمْ يَغْنَوْا فِيهَا ۗ أَلَا إِنَّ ثَمُودَ كَفَرُوا رَبَّهُمْ ۗ أَلَا بُعْدًا لِثَمُودَ  

{كأن} مخففة واسمها محذوف أي كأنهم {لم يَغنوا} يقيموا {فيها} في دارهم {ألا إن ثمود كفروا ربهم ألا بُعدا لثمود} بالصرف وتركه على معنى الحي والقبيلة.

See similar narrations below:

Collected by Qurʾān
quran:11:95 –

As if they had never prospered therein. Then, away with Madyan as Thamud was taken away.  

as if (ka-an is softened, in other words ˹understand it as˺ ka-annahum) they had never dwelt there: ‘Lo! Away with Midian, just as Thamūd was done away with!’
القرآن:١١:٩٥ –

كَأَنْ لَمْ يَغْنَوْا فِيهَا ۗ أَلَا بُعْدًا لِمَدْيَنَ كَمَا بَعِدَتْ ثَمُودُ  

{كأن} مخففة: أي كأنهم {لم يغنوا} يقيموا {فيها ألا بُعدا لمدين كما بعدت ثمود}.