Evidence of the Power and Oneness of Allah
Allah tells,
خلق السماوات واﻻرض بالحق
He has created the heavens and the earth with truth.
Allah tells us that He is the Creator of what is in the heavens and on earth, and what is between them. He is the Sovereign and Controller alternating the night and day.
يكور الليل على النهار ويكور النهار على الليل
He makes the night to go in the day and makes the day to go in the night.
means, He has subjugated them and He causes them to alternate without ceasing, each seeking the other rapidly, as He says:
يغشى اليل النهار يطلبه حثيثا
He brings the night as a cover over the day, seeking it rapidly. (7:54)
This is the meaning of that which was narrated from Ibn Abbas, may Allah be pleased with him, Mujahid, Qatadah, As-Suddi and others.
وسخر الشمس والقمر كل يجري ﻻجل مسمى
And He has subjected the sun and the moon. Each running for an appointed term.
means, for a period of time that is known to Allah, then it will come to an end on the Day of Resurrection.
أﻻ هو العزيز الغفار
Verily, He is the Almighty, the Oft-Forgiving.
means, beside His might, greatness and pride, He is Oft-Forgiving to those who disobey Him but then turn to Him in repentance