Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafsir Al Jalalayn - English tafsir for Surah Al-Qiyamah — Ayah 1
لَآ أُقۡسِمُ بِيَوۡمِ ٱلۡقِيَٰمَةِ ١
Nay! (the lā is extra in both instances) I swear by the Day of Resurrection.