Tafsir of Ash-Shams 91:1

Allah swears by His Creation that the Person Who purifies Himself will be Successful and the Person Who corrupts Himself will fail

والشمس وضحاها

By the sun and Duhaha. Mujahid said, "This means, by its light.'' Qatadah said,

وضحها

wa Duhaha. "The whole day.'' Ibn Jarir said, "The correct view is what has been said, `Allah swears by the sun and its daytime, because the clear light of the sun is daytime.'''

والقمر إذا تﻼها