The Sayings And Preaching of Al-Imam Ali (p.b.u.h)
Hadith n. 294
294. Amir al-mu’minin, peace be upon him, was asked about the distance between East and West when he replied: One day’s travelling for the sun.
Hadith n. 295
295. Amir al-mu’minin, peace be upon him, said: Your friends are three and your enemies are (also) three. Your friends are: your friend, your friend’s friend and your enemy’s enemy. And your enemies are: your enemy, your friend’s enemy and your enemy’s friend.
Hadith n. 296
296. Amir al-mu’minin, peace be upon him, saw a man busy against his enemy with what was harmful to himself too, so he said: You are like one who pierces a spear through himself in order to kill the person sitting behind him.
Hadith n. 297
297. Amir al-mu’minin, peace be upon him, said: How many are the objects of lessons, but how few the taking of lessons. 75
Hadith n. 298
298. Amir al-mu’minin, peace be upon him, said: He who goes too far in quarrelling is a sinner, but if one falls short in it, one is oppressed and it is difficult for a quarreller to fear Allah.
Source: https://www.al-islam.org/nahjul-balagha-part-2-letters-and-sayings