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 Al-Mursalat — Ayah 33
كَأَنَّهُۥ جِمَٰلَتٞ صُفۡرٞ ٣٣
It is as if the sparks that it spits out are black mountains in their darkness and size.