From this Parshah, we see that a person should try not to talk so much, as one who engages in excess speech will easily come to speak lashon hara and rechilus.
Rav Bunim of Peshischa zy’a would say, ‘Just like a person who eats excessively is called a glutton, one who speaks excessively is called a glutton with his words!’
The Rebbe of Maglinitza zy’a would say, ‘If a person minimizes his words, he is already halfway towards his yeshua!’
The Gemara (Chulin 46A) says: ‘Rich men are miserly.’ The Chozeh of Lublin zy’a asks how this can be true, as we see that many rich men are very generous. He answers that the Gemara means that they are stingy with their words. They are careful with their words, and, in this merit, they are granted wealth.’