Faanjaynahu wallatheena maAAahu birahmatin minna waqataAAna dabira allatheena kaththaboo bi-ayatina wama kanoo (surah Araf: 72)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(7:72) Then We delivered Hud and his companions by Our mercy, and We utterly cut off the last remnant of those who called the lie to Our signs and would not believe. *56

Fa anjainaahu wallazeena ma`ahoo birahmatim minnaa wa qata`naa daabiral lazeena kazzaboo bi Aayaatinaa wa maa kaanoo mu`mineen

*56). The Qur'an informs us that God brought about the total extermination of the 'Ad, a fact borne out by both Arabian historical traditions and recent archaeological discoveries. The 'Ad were so totally destroyed and their monuments so completely effaced that the Arab historians refer to them as one of the umam ba'idah (extinct peoples) of Arabia. The Arab tradition also affirms that the only people belonging to the 'Ad who survived were the followers of the Prophet Hud. These survivors are known as the Second 'Ad ('Ad Thaniyah). The Hisn al-Ghurib inscriptions referred to earlier (n. 51 above) are among the remaining monuments of these people. One inscription, which is generally considered to date from the eighteenth century B.C., as deciphered by the experts, contains the following sentences:
We have lived for a long time in this fort in full glory, free of all want. Our canals were always full to the brim with water . . . Our rulers were kings who were far removed from evil ideas, who dealt sternly with mischief-makers and governed us according to the Law of Hud. Their edicts were recorded in a book. We believed in miracles and resurrection.
The above account fully corroborates the Qur'anic statement that it was only the companions of Hud who survived and inherited the glory and prosperity of the 'Ad.