Translation of the verse 50 from Surah An-Najm : Number of verses 62 - - page 528 - Part 27.
And that it is He (Allah) Who destroyed the former 'Ad (people),
And that He destroyed the first [people of] 'Aad
(53:50) that He it is Who destroyed the ancient 'Ad, *45
*45) 'Ad Ula signifies the ancient 'Ad to whom the Prophet Hud (peace be upon him) had been appointed a Prophet. When those people were inflicted with the torment in consequence of denying the Prophet Hud, the believers only escaped the punishment. Their descendants are called `Ad Ukhra, or the latter 'Ad, in history.
Source : An-Najm Verse 50: And that He destroyed the first [people of] 'Aad