The Prophet ﷺ said, "Wealth is not in having many possessions, but rather (true) wealth is feeling sufficiency in the soul." (Using translation from Bukhārī 6446)
النَّبِيَّ ﷺ لَيْسَ الْغِنَى عَنْ كَثْرَةِ الْعَرَضِ وَلَكِنِ الْغِنَى غِنَى النَّفْسِ