Contentment as the greatest wealth
Nahj al-Balāgha|Volume 1|Book 3|Chapter 342
٣٤٢. وَقَالَ (عليه السلام): الْغِنَى الْأَكْبَرُ الْيَأْسُ عَمَّا فِي أَيْدِى النَّاسِ.
342. Amīr al-mu’minīn, peace be upon him, said: The biggest wealth is that one should not have an eye on what others possess.