Fool's heart in mouth, wise man's tongue in heart

Nahj al-Balāgha|Volume 1|Book 3|Chapter 41

Nahj al-Balāgha

Book 3, Chapter 41

Fool's heart in mouth, wise man's tongue in heart
2 Aḥadīth
Ḥadīth 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.

Ḥadīth 54

ومعناهما واحد.

The meaning of both the sayings (40 and 41) is the same.