ʿUyūn akhbār al-Riḍā

Hadith 17
intentionsincerity
17 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ‏ صَلَّى اللهُعَلَيْهِ وَآلِهِ: الإِيمانُ إِقْرارٌ بِاللِّسانِ، وَمَعْرِفَةٌ بِالقَلبِ، وَعَمَلٌ بِالأَركانِ.
31-17 According to the same documentation, God’s Prophet (S) said, “Faith consists of verbal expression, whole-hearted acceptance and acting accordingly.”
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq