Indeed they, when it was said to them, "There is no deity but Allah," were arrogant
The Saheeh International Quran Translation
إِنَّهُمْ كَانُوٓا۟ إِذَا قِيلَ لَهُمْ لَآ إِلَٰهَ إِلَّا ٱللَّهُ يَسْتَكْبِرُونَIndeed they, when it was said to them, "There is no deity but Allah," were arrogant