The Prophet ﷺ said, "Wealth is not in having many possessions, but rather (true) wealth is feeling sufficiency in the soul."  

عَنِ النَّبِيِّ ﷺ قَالَ لَيْسَ الْغِنَى عَنْ كَثْرَةِ الْعَرَضِ وَلَكِنَّ الْغِنَى غِنَى النَّفْسِ