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 Ar-Rahman — Ayah 17
رَبُّ ٱلۡمَشۡرِقَيۡنِ وَرَبُّ ٱلۡمَغۡرِبَيۡنِ ١٧
Lord of the sun’s two points of rising and its two points of setting in winter and summer.