Surah Al-Haqqah 69:13

فَإِذَا نُفِخَ فِى ٱلصُّورِ نَفْخَةٌ وَٰحِدَةٌ

Then when the Horn is blown with one blast

Translation: Saheeh International

Tafsir

Thus when the Trumpet is blown with a single blast to announce the passing of judgement upon all creatures — this being the second blast —

Excerpt from Tafsir al-Jalalayn, commentary on 69:13, via Quran.com. The reader has the full commentary and 9 more tafsirs.