The Peak of Eloquence · Hadith 1670 (#Passage #29)

٢٦. وَقَالَ (عليه السلام): مَا أَضْمَرَ أَحَدٌ شَيْئاً إِلَّا ظَهَرَ فِي فَلَتَاتِ لِسَانِهِ وَ صَفَحَاتِ وَجْهِهِ.

26. Amīr al-mu’minīn, peace be upon him, said: Whenever a person conceals a thing in his heart it manifests itself through unintentional words from his tongue and (in) the expressions of his face. [1]

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