The Peak of Eloquence · Hadith 2221 (#Passage #580)

٤٥٨. وَقَالَ (عليه السلام): (عَلَامَةُ) الْإِيمَانُ أَنْ تُؤثِرَ الصِّدْقَ حَيْثُ يَضُرُّكَ عَلَى الْكَذِبِ حَيْثُ يَنْفَعُكَ، وَأَلَّا يَكُونَ فِي حَديِثِكَ فَضْلٌ عَنْ عِلْمِكَ وَأَنْ تَتَّقِيَ اللهَ فِي حَدِيثِ غَيْرِكَ.

458. Amīr al-mu’minīn, peace be upon him, said: Belief means that you should prefer truth (even) when it harms you rather than falsehood (even) when it benefits you; that your words should not be more than your action and that you should fear Allāh when speaking about others.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).