What is the proverb for the expression "Do things in a passive way" or "playing safe"?
For instance, suppose, someone Mr X wants that Mr Y, and Mr Z both quits the job as he doesn't like either of them. So, he devises a strategy. He knows that Mr Y is in bad terms with Mr Z. So, he passively agitates Mr Y against Mr Z and vice versa. One day, either Mr Y or Mr Z loses his temper and hits the other one with a chair, and thereby both of them lose their jobs.
I think there is an English proverb for this.