Surah Ash-Shams 91:1
وَٱلشَّمْسِ وَضُحَىٰهَا
By the sun and its brightness
Translation: Saheeh International
Tafsir
By the sun and her morning light
Excerpt from Tafsir al-Jalalayn, commentary on 91:1, via Quran.com. The reader has the full commentary and 9 more tafsirs.