Surah Luqman, Ayah 30

The Might and Power of Allah Allah tells us that He

يُولِجُ الَّيْلَ فِى النَّهَارِ

(merges the night into the day,) meaning, He takes from the night and adds to the day, so that the day becomes longer and the night shorter, which is what happens in summer when the days are longest; then the day starts to become shorter and the night longer, which is what happens in winter.

وَسَخَّرَ الشَّمْسَ وَالْقَمَرَ كُلٌّ يَجْرِى إِلَى أَجَلٍ مُّسَمًّى

(and has subjected the sun and the moon, each running its course for a term appointed;) It was said that this means, each runs within its set limits, or it means until the Day of Resurrection; both meanings are correct. The first view is supported by the Hadith of Abu Dharr, may Allah be pleased with him, in the Two Sahihs, according to which the Messenger of Allah ﷺ said:

This has been stated in the verse: وَلَوْ أَنَّمَا فِي الْأَرْ‌ضِ مِن شَجَرَ‌ةٍ أَقْلَامٌ (27) through a similitude. Says the similitude: 'If all trees that are on the earth were to be pens (or pens were to be made of all branches on them) and the ocean (converted into ink) is supported by seven seas following it, the words of Allah would (still) not come to an end.' The expression: کلمات اللہ (kalimatul-lah, i.e. the words of Allah) means His knowledge and wisdom (Ruh ul-Maani and Mazhari) which includes the manifestations of Divine power and Divine blessings. Then, the 'seven seas', referred to here, do not mean that there are seven seas present elsewhere. Instead of that, this is a manner of saying: Suppose if this ocean were to be replenished with seven more oceans, still then, all these words of Allah could not be committed to writing. Even the number of 'seven' appears here as a part of the example. No restriction is intended. Another verse of the Qur'an proves it. There it was said:

Man’s existence in itself is the proof of creation. And when one’s existence is possible, the coming into existence of other lives is equally possible. It is on a parallel with man’s experience of hearing one voice and seeing one scene, which leads him to feel that it should be possible to hear many voices and see many scenes. The merging of night into day and day into night is the visible manifestation of what is known in the present age as the axial rotation of the earth. The continuous rotation of the earth on its axis with perfect precision and several other events of similar type show that the Creator and Lord of this Universe is unimaginably great. In these circumstances, who else can be worshipped except He? And who can be given the place of supreme importance in one’s life? The fact is that giving a position of greatness to anybody other than God is nothing but falsehood, because nobody except God possesses greatness.