And to Allah prostrates whoever is within the heavens and the earth, willingly or by compulsion, and their shadows [as well] in the mornings and the afternoons.
To God bow all who are in the heavens and the earth, willingly or unwillingly, as do their shadows also in the mornings and the evenings.
Whatever beings there are in the heavens and the earth do prostrate themselves to Allah (Acknowledging subjection),- with good-will or in spite of themselves: so do their shadows in the morning and evenings.
Everything prostrates unto Allah
Allah affirms His might and power, for He has full control over everything, and everything is subservient to Him. Therefore, everything, including the believers, prostrate to Allah willingly, while the disbelievers do so unwillingly,
وَظِلَـلُهُم بِالْغُدُوِّ
(and so do their shadows in the mornings), in the beginning of the days,
وَالاٌّصَالِ
(and in the afternoons.) towards the end of the days. Allah said in another Ayah,