Nahj al-Balagha Hadith n. 267

Selections from The Sayings and Preaching of Amir al-Muminin Ali ibn Abi Talib (Peace Be Upon Him) Including His Replies to Questions and Maxims Expressed for Various Purposes.
Translated by Sayyid Ali Reza

وَقَالَ (عليه ‏السلام):

Amir al-mu'minin, peace be upon him, said:

يَابْنَ آدَمَ،

O son of Adam,

لاَ تَحْمِلْ هَمَّ يَوْمِكَ الَّذِي لَمْ يَأْتِكَ عَلَى يَوْمِكَ الَّذِي قَدْ أَتَاكَ،

do not inflict the worry of the day that has not yet come on the day which has already come,

فَإِنَّهُ إِنْ يَكُ مِنْ عُمُرِكَ يَأْتِ اللهُ فِيهِ بِرِزْقِكَ.

because if that day be in your life Allah will bestow its livelihood also.