Verily, in this is indeed a sign, yet most of them are not believers.meaning, in the dispute of Ibrahim with his people and his proof of Tawhid there is a sign, i.e., clear evidence that there is no God but Allah.وَمَا كَانَ أَكْثَرُهُم مُّوْمِنِينَوَإِنَّ رَبَّكَ لَهُوَ الْعَزِيزُ الرَّحِيمُ