The Peak of Eloquence · Hadith 1692 (#Passage #51)

٤٠. وَقَالَ (عليه السلام) : لِسَانُ الْعَاقِلِ وَرَاءَ قَلْبِهِ، وَقَلْبُ الْأَحْمَقِ وَرَاءَ لِسَانِهِ.

40. Amīr al-mu’minīn, peace be upon him, said: The tongue of the wise man is behind his heart, and the heart of the fool is behind his tongue.

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