The Peak of Eloquence · Hadith 1694 (#Passage #53)

٤١. وقد روي عنه (عليه السلام) هذا المعنى بلفظ آخر، وهو قوله: قَلبُ الْأَحْمَقِ فِي فِيهِ، وَلِسَانُ الْعَاقِلِ فِي قَلْبِهِ.

41. This very sense has been related from Amīr al-mu’minīn, peace be upon him, in a different version as follows: The heart of a fool is in his mouth while the tongue of the wise man is in his heart.

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