Wassama-i thati alhubuk (surah zariyat: 7)

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

(51:7) By the heaven with its numerous forms: *5

Wassamaaa`i zaatil hubuk

*5) The word hubuk in the original is also used for the paths and for the waves which are produced on the sand of the desert and the surface of stagnant water by the wind; it is also spoken for the curls in wavy hair. Here, the sky has been characterized by "hubuk" either because the sky is often overcast with clouds of different shapes, which go on changing because of the wind, and no shape lasts nor resembles any other, or because at night one sees the stars scattered in the sky in many different combinations and no combination resembles any other combination.