Al-Imam Ali (p.b.u.h), said:

Hadith n. 413

413. Amir al-mu’minin, peace be upon him, said: One should endure like free people, otherwise one should keep quiet like the ignorant.

Hadith n. 414

414. Amir al-mu’minin, peace be upon him, said: In another tradition it is related that Imam (A.S.) said to al-Ash’ath ibn Qays by way of condolence on the death of his son: Either endure like great people or else you will forget like animals.

Hadith n. 415

415. Amir al-mu’minin, peace be upon him, said about the world: It deceives, it harms and it passes away. Allah, the Sublime, did not approve it as a reward for His lovers nor as a punishment for His enemies. In fact, the people of this world are like those riders that as soon as they alighted the driver called out to them and they marched off.

Hadith n. 416

416. Amir al-mu’minin, peace be upon him, said to his son al-Hasan (peace be upon him): O my son, do not leave anything of this world behind you, because you will be leaving it for either of two sorts of persons: Either a person who uses it in obeying Allah, in this case he will acquire virtue through what was evil for you, or it will be a person who uses it in disobeying Allah and in that case he will be earning evil with what you collected for him, and so you will be assisting him in his sinfulness; and neither of these two deserves to be preferred by you over yourself.

Sayyid ar-Razi says: This saying is also related in another version thus:

Whatever of this world is now with you was with others before you, and it will pass to some others after you. Thus, you are collecting things for either of two sorts of men: a man who uses whatever you collected in obedience of Allah and thus acquired virtues with what was evil for you, or a man who uses it in disobeying Allah, so you will be getting evil for what you collected. Neither of these two is such that you should prefer him over your own self, or you may burden yourself for his own sake. Therefore, hope for the mercy of Allah for him who has passed away and for Divine livelihood for him who survives.

Source: https://www.al-islam.org/nahjul-balagha-part-2-letters-and-sayings