The Vedanta Sutras of Badarayana, Commentary by Sankara (SBE38), tr. by George Thibaut  at sacred-texts.com
20. And thus perception and inference show.
Scripture and Smriti both declare that the highest light does not abide within effected things, 'The sun does not shine there, nor the moon and the stars, nor these lightnings, and much less this fire' (Mu. Up. II, 2, 10). 'The sun does not illume it, nor the moon, nor fire' (Bha. Gîtâ XV, 6).--The Sûtra is meant to show that the non-abiding of the
highest light within effected things is a well-known circumstance.