Al-Imam Ali (p.b.u.h), said:
Hadith n. 379
379. Amir al-mu’minin, peace be upon him, said: O son of Adam, livelihood is of two kinds: the livelihood which you seek and the livelihood which seeks you; if you do not reach it, it will come to you Therefore, do not turn your one day’s worry into a year’s worry. Whatever you get every day should be enough for you for the day. If you have a whole year of your life even then Allah, the Sublime, will give you every next day what He has destined as your share. If you do not have a year in your life then why should you worry for what is not for you. No seeker will reach your livelihood before you nor will anyone overpower you in the matter of livelihood. Similarly, whatever has been destined as your share will not be delayed for you.
as-Sayyid ar-Radi says: This saying has already appeared elsewhere in this chapter except that here it is clearer and more detailed. This is why we have repeated it according to the principle laid down in the beginning of the book.
Hadith n. 380
380. Amir al-mu’minin, peace be upon him, said: Many a man faces a day after which he finds no day and many a man is in an enviable position in the earlier part of the night but is wept over by bewailing women in its later part.
Hadith n. 381
381. Amir al-mu’minin, peace be upon him, said: Words are in your control until you have not uttered them; but when you have spoken them out you are under their control. Therefore, guard your tongue as you guard your gold and silver, for often one expression snatches away a blessing and invites punishment.
Hadith n. 382
382. Amir al-mu’minin, peace be upon him, said: Do not say what you do not know; rather do not say all that you know, because Allah has laid down some obligations for all your limbs by means of which He will put forth arguments against you on the Day of Judgment.
Hadith n. 383
383. Amir al-mu’minin, peace be upon him, said: Fear lest Allah sees you while committing His sins or misses you when it is time to obey Him and as a result thereof you become a loser. Therefore, when you are strong be strong in obeying Allah and when you are weak be weak in committing sins of Allah.
Source: https://www.al-islam.org/nahjul-balagha-part-2-letters-and-sayings