سورة Al-Anam 6:23

ثُمَّ لَمْ تَكُن فِتْنَتُهُمْ إِلَّآ أَن قَالُوا۟ وَٱللَّهِ رَبِّنَا مَا كُنَّا مُشْرِكِينَ ٢٣

Their only argument will be: “By Allah, our Lord! We were never polytheists.”