Surah Al-Qasas 28:76

۞ إِنَّ قَـٰرُونَ كَانَ مِن قَوْمِ مُوسَىٰ فَبَغَىٰ عَلَيْهِمْ ۖ وَءَاتَيْنَـٰهُ مِنَ ٱلْكُنُوزِ مَآ إِنَّ مَفَاتِحَهُۥ لَتَنُوٓأُ بِٱلْعُصْبَةِ أُو۟لِى ٱلْقُوَّةِ إِذْ قَالَ لَهُۥ قَوْمُهُۥ لَا تَفْرَحْ ۖ إِنَّ ٱللَّهَ لَا يُحِبُّ ٱلْفَرِحِينَ

Indeed, Qārūn was from the people of Moses, but he tyrannized them. And We gave him of treasures whose keys would burden a band of strong men; thereupon his people said to him, "Do not exult. Indeed, Allāh does not like the exultant.

Translation: Saheeh International

Tafsir

Indeed Korah belonged to the people of Moses — being his paternal and maternal cousin and he had believed in him in Moses — but he became insolent towards them through his disdain haughtiness and great wealth. …

Excerpt from Tafsir al-Jalalayn, commentary on 28:76, via Quran.com. The reader has the full commentary and 9 more tafsirs.