Renouncing worldly desires and self-discipline
Nahj al-Balāgha|Volume 1|Book 3|Chapter 359
۳۵۹. وَقَالَ (عليه السلام): يَا أَسْرَى الرَّغْبَةِ أَقْصِرُوا فَإِنَّ الْمُعَرِّجَ عَلَى الدُّنْيَا لَا يَرُوعُهُ مِنْهَا إِلَّا صَرِيفُ أَنْيَابِ الْحِدْثَانِ.
359. Amīr al-mu’minīn, peace be upon him, said: O’ slaves of desires, cut them short because he who leans on the world gets nothing out of it except the pain of hardships.