Surah An-Najm 53:50

وَأَنَّهُۥٓ أَهْلَكَ عَادًا ٱلْأُولَىٰ

And that He destroyed the first [people of] ʿAad.

Translation: Saheeh International

Tafsir

and that He destroyed former ‘Ād ‘Ādan al-ūlā a variant reading elides the nunation with the following lām sc. ‘Āda’l-ūlā; this former one refers to the people of ‘Ād while the second ‘Ād is that of the people of Sālih

Excerpt from Tafsir al-Jalalayn, commentary on 53:50, via Quran.com. The reader has the full commentary and 9 more tafsirs.