ذَٰلِكَ بِأَنَّ ٱللَّهَ هُوَ ٱلۡحَقُّ وَأَنَّ مَا يَدۡعُونَ مِن دُونِهِۦ هُوَ ٱلۡبَٰطِلُ وَأَنَّ ٱللَّهَ هُوَ ٱلۡعَلِيُّ ٱلۡكَبِيرُ ٦٢
That is because Allāh is the True Reality, and that which they call upon other than Him is falsehood, and because Allāh is the Most High, the Grand.
Translation: Saheeh International (English)
Each word's meaning and sound
The aforementioned, i.e. entering the night into the day and the day into the night, is because Allah is truly existent, and so His religion is the truth, His promise is also true and His helping the believers is also true. The idols that the idolaters worship instead of Allah are false and have no basis. And Allah is supreme over His creation in being, in power and in subjugation; the Grand to Whom belongs all majesty, grandeur and exaltedness.
Al-Mukhtasar in interpreting the Noble Quran