﴿ وَكَانَ فِى ٱلْمَدِينَةِ تِسْعَةُ رَهْطٍۢ يُفْسِدُونَ فِى ٱلْأَرْضِ وَلَا يُصْلِحُونَ ﴾

“Now there were in the city nine men who were wont to commit deeds of depravity all over the land, and would not reform;”

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.