Accountability of those who deny truth

وَإِن يُكَذِّبُوكَ فَقَدْ كَذَّبَتْ قَبْلَهُمْ قَوْمُ نُوحٍ وَعَادٌ وَثَمُودُ

And if they deny you, [O Muḥammad] - so, before them, did the people of Noah and ʿAad and Thamūd deny [their prophets],