Nahj al-Balagha Hadith n. 458

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:

عَلامةُ الاْيمَانِ

Belief means

أَنْ تُؤثِرَ

you should prefer

الصِّدْقَ

truth

حَيْثُ يَضُرُّكَ

when it harms you

عَلَى الْكَذِبِ

rather than falsehood

حَيْثُ يَنْفَعُكَ،

when it benefits you;

أَنْ يَكُونَ فِي حَديِثِكَ فَضْلٌ عَنْ عِلْمِكَ

your words should not be more than your action

وَأَنْ تَتَّقِيَ اللهَ فِي حَدِيثِ غَيْرِكَ.

and you should fear Allah when speaking about others.