Surah Ash-Shu'ara 26:8

إِنَّ فِى ذَٰلِكَ لَـَٔايَةً ۖ وَمَا كَانَ أَكْثَرُهُم مُّؤْمِنِينَ

Indeed in that is a sign, but most of them were not to be believers.

Translation: Saheeh International

Tafsir

Surely in that there is a sign an indication of the perfection of His power exalted be He; but most of them in God’s knowledge are not believers kāna here according to Sībawayhi is extra.

Excerpt from Tafsir al-Jalalayn, commentary on 26:8, via Quran.com. The reader has the full commentary and 9 more tafsirs.