The Sayings And Preaching of Al-Imam Ali (p.b.u.h)
Hadith n. 253
253. Amir al-mu’minin, peace be upon him, used to say: If you want an oppressor to take an oath ask him to swear like this that he is out of Allah’s might and His power, because if he swears falsely in this way he will be quickly punished, while if he swears by Allah Who is such that there is no god but He, he will not be quickly punished since he is expressing the Unity of Allah, the Sublime. 61ciii
Hadith n. 254
254. Amir al-mu’minin, peace be upon him, said: O son of Adam, be your own representative in the matter of your property and do about it whatever you want to be done with it after your death. 62
Hadith n. 255
255. Amir al-mu’minin, peace be upon him, said: Anger is a kind of madness because the victim to it repents afterwards. If he does not repent his madness is confirmed.
Hadith n. 256
256. Amir al-mu’minin, peace be upon him, said: Health of body comes from paucity of envy. 63
Hadith n. 257
257. Amir al-mu’minin, peace be upon him, said to Kumayl ibn Ziyad an-Nakha’i: O Kumayl, direct your people to go out in the day to achieve noble traits and to go out in the night to meet the needs of those who might be sleeping, for I swear by Him Whose hearing extends to all voices if ever someone pleases another’s heart, Allah will create a special thing out of this pleasing so that whenever any hardship befalls him it will come running like flowing water and drive away the hardship as wild camels are driven away.
Source: https://www.al-islam.org/nahjul-balagha-part-2-letters-and-sayings