لَاا الشَّمْسُ يَنبَغِي لَهَا أَن تُدْرِكَ الْقَمَرَIt is not for the sun to overtake the moon,Mujahid said,"Each of them has a limit which it does not transgress or fall short of. When the time of one comes, the other goes away, and when the time for one to prevail comes, the time of the other ceases."Ikrimah said concerning the Ayah, لَاا الشَّمْسُ يَنبَغِي لَهَا أَن تُدْرِكَ الْقَمَرَ (It is not for the sun to overtake the moon),this means that each of them has its time when it prevails. So it is not appropriate for the sun to rise at night.وَلَا اللَّيْلُ سَابِقُ النَّهَارِnor does the night outstrip the day.means, after night has passed, it is not right for another night to come until it has been day. The authority of the sun is during the day and the authority of the moon is at night.Ad-Dahhak said,"The night does not depart from here until the day comes from here -- and he pointed to the east."Mujahid said:وَلَا اللَّيْلُ سَابِقُ النَّهَارِ (nor does the night outstrip the day),"They seek one another rapidly."The meaning is that there is no gap between night and day; each of them follows the other with no interval, because they have been subjugated and are both constantly pursuing one another.وَكُلٌّ فِي فَلَكٍ يَسْبَحُونَThey all float, each in an orbit.means, night and day, the sun and the moon, all of them are floating, i.e., revolving, in their orbits in the heaven.This was the view of Ibn Abbas, Ikrimah, Ad-Dahhak, Al-Hasan, Qatadah and `Ata' Al-Khurasani.Ibn Abbas, may Allah be pleased with him, and others among the Salaf said,"In an orbit like the arc of a spinning wheel.