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 66
فِيهِمَا عَيۡنَانِ نَضَّاخَتَانِ ٦٦
In these two gardens there are springs that forcefully gush forth with water. The gushing of their water does not stop.