Allah states that He is the King and Owner of the heavens and earth and all of what is in them, and that He has written mercy on His Most Honorable Self. It is recorded in the Two Sahihs, that Abu Hurayrah said that the Prophet said,
(Indeed He will gather you together on the Day of Resurrection, about which there is no doubt.) swearing by His Most Honored Self that He will gather His servants,
The word, ` sukun' appearing in verse 13: وَلَهُ مَا سَكَنَ فِي اللَّيْلِ وَالنَّهَارِ (And to Him belongs what finds rest in the night and the day) could either mean the state of being still or at rest, in which case, the verse would mean that Allah is the Master of everything present in the night and the day. Or, it is also possible that the sense could be that of a combined state of stillness and movement (which would amount to saying - what tarries and what moves), but what was mentioned here is the state of sukun or rest only - because, movement which stands in contrast to it can be understood as being obvious enough.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 13–15
In this world communicating the Word of God is a task of some complexity. This is because God has ordained that the Truth be veiled in doubt, so that man may find reasons for rejecting it alongside arguments in support of its acceptance. The real test of man is that he should be able to tear down the veil of doubt and raise himself to the position of certainty. He should eschew doubt in all its guises and take a firm hold of the divine Truth. Believing without seeing is the real test of man. When reality is made visible, its acceptance has no value. Man denies the obvious truth. On obtaining power, he degrades others. One man makes another the victim of his tyranny. Why is this so? Does man wield absolute power in this world? Is there nobody here to stay his hand? Is there a combination of opposites in God’s regime, given that He seems to have filled man’s world with oppression and injustice and the rest of the world with mercy and meaningfulness? No, it is not so. God, who is the Lord of Heaven and earth, is also the Lord of that creature who toils during the day and rests at night. Just as God’s grace is given unstintingly to the universe, so also is it given to human beings. The difference is that for the rest of the world, His grace is fully in evidence right from the first day, whereas for the world of human beings, His grace will be fully shown on the Day of Judgement.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.