Surah Al-Muddaththir 74:8

فَإِذَا نُقِرَ فِى ٱلنَّاقُورِ

And when the trumpet is blown,

Translation: Saheeh International

Tafsir

For when the trumpet is sounded when the trumpet is blown that is the Horn qarn at the second blast

Excerpt from Tafsir al-Jalalayn, commentary on 74:8, via Quran.com. The reader has the full commentary and 9 more tafsirs.