Jami' at-Tirmidhi #2317
Sahih (Authentic)
Contentment
لَيْسَ الْغِنَى عَنْ كَثْرَةِ الْعَرَضِ وَلَكِنَّ الْغِنَى غِنَى النَّفْسِ
The Messenger of Allah (ﷺ) said: 'Richness is not having many possessions. Rather, true richness is the richness of the soul.'
Chain of Narration (Isnad)
Narrated Abu Huraira