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-Fajr — Ayah 13
فَصَبَّ عَلَيۡهِمۡ رَبُّكَ سَوۡطَ عَذَابٍ ١٣
So Allah made them suffer His severe punishment, and annihilated them off the earth.