Nahj al-Balāgha
Hadith 1997٤٤. وَقَالَ (عليه السلام): طُوبَى لِمَنْ ذَكَرَ الْمَعَادَ، وَعَمِلَ لِلْحِسَابِ، وَقَنِعَ بِالْكَفَافِ، وَرَضِيَ عَنِ اللهِ.
44. Amīr al-mu’minīn, peace be upon him, said: Blessed is the person who kept in mind the next life, acted so as to be able to render account, remained content with what sufficed him and remained pleased with Allāh.