Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafsir Ibne Kathir tafsir for Surah 'Abasa — Ayah 25
أَنَّا صَبَبۡنَا ٱلۡمَآءَ صَبّٗا ٢٥
(أَنَّا صَبَبْنَا الْمَاءَ صَبًّا) «Мы проливаем обильные ливни» - посылая их с небес на землю.