3:190
إِنَّ فِى خَلْقِ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ وَٱخْتِلَٰفِ ٱلَّيْلِ وَٱلنَّهَارِ لَءَايَٰتٍۢ لِّأُو۟لِى ٱلْأَلْبَٰبِ
Indeed, in the creation of the heavens and the earth and the alternation of the night and the day are signs for those of understanding.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Proofs of Tawhid for People of Understanding, their Characteristics, Speech, and Supplications
Allah said,
إِنَّ فِى خَلْقِ السَّمَـوَتِ وَالاٌّرْضِ
(Verily, in the creation of the heavens and the Earth,) 3:190, referring to the sky in its height and spaciousness, the earth in its expanse and density, the tremendous features they have of rotating planets, seas, mountains, deserts, trees, plants, fruits, animals, metals and various beneficial colors, scents, tastes and elements.
وَاخْتِلَـفِ اللَّيْلِ وَالنَّهَارِ
(And in the alternation of night and day), as one follows and takes from the length of the other. For instance, at times one of them becomes longer than the other, shorter than the other at times and equal to the other at other times, and the same is repeated again and again, and all this occurs by the decision of the Almighty, Most Wise. This is why Allah said,