A Segulah for Wealth:

Rav Chaim Palagi zt'l (Sefer Tochachos Mussar, Parshas Metzorah) writes that the punishment for speaking lashon hara is poverty. But when one avoids this sin, he merits great wealth. Sefarim Hakedoshim also say that guarding one's mouth is a segulah for wealth. The Chozeh of Lublin zy "a discerns this from the Gemara (Chulin 46A) that says: "Rich men are miserly." He asks: Are all rich men stingy? Aren't some of them very generous? The Chozeh answers that this isn't referring to money. Rather, it means that they are miserly with their words. They guard their mouths and do not speak unnecessary words and, as a result, they were blessed with wealth.