Nahj al-Balagha Hadith n. 227

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

وقال عليه السلام وقد سئل عن الاِيمان:

Amir al-mu'minin, peace be upon him, was asked about belief (iman) when he said:

الاْيمَانُ مَعْرِفَةٌ بِالْقَلْبِ،

Belief means appreciation with the heart,

وَإِقْرَارٌ بِاللِّسَانِ،

acknowledgement with the tongue,

وعَمَلٌ بِالاْرْكَانِ.

and action with the limbs.