سورة التكوير
‘Coursers’ is given for jawar, the plural of jariya, meaning something that is in motion. The planets appear to move through the sky. ‘Disappearers’ is given for kunnas, the plural of kanis, meaning something that conceals itself in its place, like a gazelle conceals itself in its home. So it reads: ‘I swear not by the planets in motion that return to their heavenly station and run their orbit and then conceal themselves in their places.’ For in the beginning of the night one sees the planets have returned from their concealment, then he sees their movement and thereafter their disappearance.
Muhammad Shirazi, Translating Surah At Takwir