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 Adh-Dhariyat — Ayah 18
وَبِٱلۡأَسۡحَارِ هُمۡ يَسۡتَغۡفِرُونَ ١٨
And at the time of morning they seek forgiveness from Allah for their sins.