Kaththabat qablahum qawmu noohin waas-habu arrassi wathamood (surah Qaf: 12)

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

(50:12) In the past Noah's people, and the people of Rass *12 and Thamud gave the lie (to Messengers),

Kazzabat qablahum qawmu Noohinw wa Ashaabur Rassi wa Samood

*12) Before this the people of Rass (Ashab ar-Rass) have been mentioned in Surah AI-Furqan: 38 above, and now here, but at both places they have been only referred to as of those nations who rejected the Prophets. No other detail about them has been given. In the traditions of Arabia two places are well known by the name of ar-Rass, one in the Najd and the other in northern Hejaz. Of these ar-Rass of the Najd is better known and has been referred to more often in the pre-Islamic poetry of Arabia. Now it is difficult to detetmine which of these was the home of the Ashab ar-Rass. No reliable detail of their story is found in any tradition either. The most that one can say with certainty is that it was a nation which had thrown its Prophet into a well. But from the mere allusion that has been made to them in the Qur'an one is led to think that in the time of the revelation of the Qur'an the Arabs were generally aware of this nation and its history, but the traditions about them could not be preserved in historic records.