Surah Adh-Dhariyat, Ayah 18
Quran 51:18 · The Winnowing Winds · Makki · Para 26 · Page 521
وَبِالْاَسْحَارِ هُمْ یَسْتَغْفِرُوْنَ ۟
Transliteration
Wabil-ashari humyastaghfiroon
Saheeh International
And in the hours before dawn they would ask forgiveness,
Al-Mukhtasar fi Tafsir
And at the time of morning they seek forgiveness from Allah for their sins.
Tafsir Ibn Kathir (abridged)
Explains 51:15–51:23 together — read it on 51:15