Surah An-Naml 27:48

وَكَانَ فِى ٱلْمَدِينَةِ تِسْعَةُ رَهْطٍ يُفْسِدُونَ فِى ٱلْأَرْضِ وَلَا يُصْلِحُونَ

And there were in the city nine family heads causing corruption in the land and not amending [its affairs].

Translation: Saheeh International

Tafsir

And there were in the city the city of Thamūd a band of nine men that is nine men who were causing corruption in the land with acts of disobedience which included their corroding of dinar and dirham coins rendering them worthless and did not reform their ways through obedience to God.

Excerpt from Tafsir al-Jalalayn, commentary on 27:48, via Quran.com. The reader has the full commentary and 9 more tafsirs.