Wa-ila AAadin akhahum hoodan qala ya qawmi oAAbudoo Allaha ma lakum min (surah Araf: 65)

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

(7:65) And to 'Ad *51 We sent forth their brother Hud. He said: '0 my people! Serve Allah; you have no other god than Him. Will you, then, not avoid evil?'

Wa ilaa `aadin akhaahum Hoodaa; qaala yaa qawmi` budul laaha maa lakum min ilaahin ghairuh; afalaa tattaqoon

*51). 'Ad, an ancient Arab people, were well-known throughout Arabia. They were known for their proverbial glory and grandeur. And when they were destroyed, their extinction also became proverbial. So much so that ttre word 'Ad has come to be used for things ancient and the word 'adiyat for archaeological remains. The land whose owner is unknown and which is lying fallow, from neglect is called 'adi al-ard.
The ancient Arabic poetry is replete with references to this people. Arab genealogists consider the 'Ad as the foremost among the extinct tribes of Arabia. Once a person of the Banel Dhuhl b. Shayban tribe, who was a resident of the 'Ad territory, called on the Prophet (peace be on him). He related stories to the Prophet about the people of 'Ad, stories handed down to the people of that region from generation to generation. (See Ahmad b. Hanbal, Musnad, vol. 3, p. 482 - Ed.)
According to the Qur'an the people of 'Ad lived mainly in the Ahqaf region which is situated to the south-west of the Empty Quarter (al-Rub' al-Khali) and which lies between Hijaz, Yemen and Yamamah. It was from there that the people of 'Ad spread to the western coast of Yemen and established their hegemony in Oman, Hadramawt and Iraq. There is very little archaeological evidence about the 'Ad. Only a few ruins in South Arabia are ascribed to them. At a place in Hadramawt there is a grave which is considered to be that of the Prophet Hud. James R. Wellested, a British naval officer, discovered an ancient inscription in 1837 in a place called Hisn al-Ghurab which contains a reference to the Prophet Hud. The contents unmistakably bear out that it had been written by those who followed the Shari'ah of Hud. (For details see Tafhim al-Qur'an, al-Al. Ahqaf 46, n. 25.)