Washshamsi waduhaha (surah Shams: 1)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(91:1) By the sun and its heat and brightness, *1

Wash shamsi wa duhaa haa

*1) The word duha as used in the original applies both to the light of the sun and to its heat. Although in Arabic its well known meaning is the time between sunrise and meridian when the sun has risen high, at that height it does not only give light but heat too. Therefore, when the word duha is attributed to the sun, its full meaning can be expressed more appropriately by its radiant brightness than by its light, or by the time of the day that it indicates.