The Quran gives no date
The Companions of al-Rass
The Quran names the Companions of al-Rass, 'the well', among nations destroyed for denying their messenger, beside Ad and Thamud.
And [We destroyed] 'Aad and Thamud and the companions of the well and many generations between them.
Quran 25:38
Source: Quran, Ibn Kathir