Nahj al-Balāgha

Hadith 2241
governance
٤٤١. وَقَالَ (عليه ‏السلام): الْوِلَايَاتُ مَضَامِيرُ الرِّجَالِ.
441. Amīr al-mu’minīn, peace be upon him, said: Governing power is the proving ground for people.
Source: al-Sharīf al-Raḍī