ذَٰلِكَ بِأَنَّ ٱللَّهَ هُوَ ٱلۡحَقُّ وَأَنَّ مَا يَدۡعُونَ مِن دُونِهِ ٱلۡبَٰطِلُ وَأَنَّ ٱللَّهَ هُوَ ٱلۡعَلِيُّ ٱلۡكَبِيرُ ٣٠
That is because Allāh is the True Reality, and that what they call upon1 other than Him is falsehood, and because Allāh is the Most High, the Grand.
Translation: Saheeh International (English)
1 In worship.
Each word's meaning and sound
That organisation and decree bears testimony to Allah alone being true; He is true in His being, attributes and actions. It also bears testimony to everything that the idolaters worship being unfounded falsehood, and that Allah is the Exalted in His being and His attributes over all His creation; there is none higher than Him, and He is greater than everything.
Al-Mukhtasar in interpreting the Noble Quran