ט״ז בסיון ה׳תש״פ
- One who speaks lashon hara in order to find favor in the eyes of the listener, has transgressed the prohibition, You shall not bring flattery upon the land, which many Commentators consider to be a negative commandment. One who listens to lashon hara in order to find favor in the eyes of the speaker, and either agrees with what is said, or adds negative words of his own, has also committed this sin of flattery.
17. One who speaks lashon hara out of anger, will very often come to curse his fellow, sometimes in the name of G-d. Such a person – even when not using the holy language – transgresses the negative commandment, Do not curse the deaf.
Every moment that prerson restrain him mouth he acquiting to the Hidden Light, that there is no Mal'ach and creation to be able Imagine.(Hagra letter) 1