Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafsir Jalalayn tafsir for Surah Ar-Rahman — Ayah 5
ٱلشَّمۡسُ وَٱلۡقَمَرُ بِحُسۡبَانٖ ٥
(Matahari dan bulan menurut perhitungan) maksudnya, keduanya beredar menurut perhitungan.