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-Layl — Ayah 18
ٱلَّذِي يُؤۡتِي مَالَهُۥ يَتَزَكَّىٰ ١٨
The one who spends his wealth in righteous avenues, to purify himself of sins.