Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
English Al-Mukhtasar tafsir for Surah Adh-Dhariyat — Ayah 13
يَوۡمَ هُمۡ عَلَى ٱلنَّارِ يُفۡتَنُونَ ١٣
So Allah answers their question: the day they will be punished on the fire.