Clean speech

Hi,

"It was taught in the school of Rabbi Yishmael: One should always speak with clean language...as it is written, 'And one should be selective in his speech as clever people are (Job 15),' and 'And the knowledge of my lips was expressed selectively (Job 33)."

(Talmud, Pesachim 3a)

Have a great day,
Mordechai